**Comparing Rates Worksheet :**

Worksheet given in this section is much useful to the students who would like to practice problems on comparing rates.

Before look at comparing rates worksheet, if you would like to know the stuff about unit rates, please click here.

1. Which is best,

10 pencils cost $4

or

6 pencils cost $2.70 ?

2. Which is best,

2 liters of milk at $3.80

or

1.5 liters of milk at $2.70 ?

3. Who is better in earning,

David earns $57.60 in 8 hours

or

John earns $90 in 12 hours ?

4. Who is driving faster,

Alex covers 120 miles in 3 hours

or

Jose covers 84 miles in 2 hours ?

5. Who is better,

Lily can prepare 10.4 gallons of juice in 4 days

or

Rosy can prepare 7.5 gallons of juice in 3 days ?

6. Which is best,

500 grams cheese cost $ 3.25

or

1.5 kilograms cheese cost $ 9.9

7. Who is driving faster,

Lenin covers 6 miles in 2 minutes

or

Daniel covers 225 miles in 1.5 hours ?

8. Who is better in walking,

Shanel walks 2/ 5 of a mile every 1/7 hour.

or

Declan walks 3/5 of a mile every 2/7 hour ?

9. Who is better,

Daniel answered 240 answers correctly out of 300 questions

or

Deborah answered 328 questions correctly out of 400 questions ?

10. Which is best,

Plan A : Income of $250 on $5000 investment

or

Plan B : Income of $280 on $7000 investment

Let us look at step by step solution for each problem given on "Comparing rates worksheet".

**Problem 1 :**

Which is best,

10 pencils cost $4

or

6 pencils cost $2.70 ?

**Solution : **

To compare the given measures, convert them in to unit rates.

Cost of 10 pencils = $4 Cost of 1 pencil = 4/10 Cost of 1 pencil = $0.40 |
Cost of 6 pencils = $2.70 Cost of 1 pencil = 2.7/6 Cost of 1 pencil = $0.45 |

We get the lowest price per pencil $0.40 in "10 pencils cost $4"

Hence, "10 pencils cost $4" is the best deal.

**Problem 2 :**

Which is best,

2 liters of milk at $3.80

or

1.5 liters of milk at $2.70 ?

**Solution : **

**To compare the given measures, convert them in to unit rates. **

2 liters of milk at $3.80 Cost of 1 liter = 3.8/2 Cost of 1 liter = $1.90 |
2 liters of milk at $2.70 Cost of 1 liter = 2.7/1.5 Cost of 1 liter = $1.8 |

From the above unit rates, we get the lower price per liter of milk $1.8 in "2 liters cost $2.70"

Hence, "2 liters cost $2.70" is the best deal.

**Problem 3 :**

Who is better in earning,

David earns $57.60 in 8 hours

or

John earns $90 in 12 hours ?

**Solution : **

**To compare the given measures, convert them in to unit rates. **

Earning in 8 hrs = $57.60 Earning in 1 hr = 57.60/ 8 Earning in 1 hr = $7.20 |
Earning in 12 hrs = $90 Earning in 1 hr = 90/12 Earning in 1 hr = $7.50 |

From the above unit rates, John earns more than David per hour.

Hence, John is earning better.

**Problem 4 :**

Who is driving faster,

Alex covers 120 miles in 3 hours

or

Jose covers 84 miles in 2 hours ?

**Solution : **

**To compare the given measures, convert them in to unit rates. **

Distance in 3 hrs = 120 miles Distance in 1 hr = 120 / 3 Distance in 1 hr = 40 miles |
Distance in 2 hrs = 84 miles Distance in 1 hr = 84 / 2 Distance in 1 hr = 42 miles |

From the above unit rates, Jose covers more miles than David per hour.

Hence, Jose is driving faster.

**Problem 5 :**

Who is better,

Lily can prepare 10.4 gallons of juice in 4 days

or

Rosy can prepare 7.5 gallons of juice in 3 days ?

**Solution : **

**To compare the given measures, convert them in to unit rates. **

No.gallons in 2 days = 5.2 No.of gallons in 1 day = 5.2/2 No.of gallons in 1 day = 2.6 |
No. gallons in 3 days = 7.5 No. of gallons in 1 day = 7.5/3 No.of gallons in 1 day = 2.5 |

From the above unit rates, Lily prepares more gallons than day.

Hence, Lily is better.

**Problem 6 :**

Which is best,

500 grams cheese cost $ 3.25

or

1.5 kilograms cheese cost $ 9.9

**Solution : **

**To compare the given measures, convert them in to unit rates in price per kilogram. **

500 grams -----> $3.25 1 kilogram = 2 ⋅ 500 grams Price of 1 kg = 2 ⋅ 3.25 Price of 1 kg = $6.5 |
1.5 kilograms -----> $9.9 Price of 1 kg = 9.9 / 1.5 Price of 1 kg = $6.6 |

From the above unit rates, we get the lower price per kilogram $6.5 in "500 grams cheese cost $ 3.25"

Hence, "500 grams cheese cost $ 3.25" is the best deal.

**Problem 7 :**

Who is driving faster,

Lenin covers 6 miles in 2 minutes

or

Daniel covers 225 miles in 1.5 hours ?

**Solution : **

**To compare the given measures, convert them in to unit rates in distance per hour. **

Distance in 2 min = 6 miles Distance in 1 min = 3 miles 1 hour = 60 minutes Distance in 1 hr = 60 ⋅ 3 Distance in 1 hr = 180 miles |
Distance in 1.5 hrs =225 miles Distance in 1 hr = 225 / 1.5 Distance in 1 hr = 150 miles |

From the above unit rates, Lenin covers more miles than Daniel per hour.

Hence, Lenin is driving faster.

**Problem 8 :**

Who is better in walking,

Shanel walks 2/ 5 of a mile every 1/7 hour.

or

Declan walks 3/5 of a mile every 2/7 hour ?

**Solution : **

**To compare the given measures, convert them in to unit rates in miles per hour (speed).**

**Speed = Distance / Time **

Speed = (2/5) / (1/7) Speed = (2/5) ⋅ (7/1) Speed = 14 / 5 Speed = 2.8 miles per hour |
Speed = (3/5) / (2/7) Speed = (3/5) ⋅ (7/2) Speed = 21 / 10 Speed = 2.1 miles per hour |

From the above unit rates, Shanel walk more miles than Declan per hour.

Hence, Shanel is better in walking.

**Problem 9 :**

Who is better,

Daniel answered 240 answers correctly out of 300 questions

or

Deborah answered 328 questions correctly out of 400 questions ?

**Solution : **

**To compare the given measures, convert them in to percentages .**

**Percent= [no. of correct answers / To tal no. of questions] x 100 % **

Percent = [240/300] ⋅ 100 % Percent = 80 % |
Percent = [328/400] ⋅ 100 % Percent = 82 % |

From the above percentages, Deborah answered more questions correctly than Daniel per 100.

Hence, Deborah is better.

**Problem 10 :**

Which is best,

Plan A : Income of $250 on $5000 investment

or

Plan B : Income of $280 on $7000 investment

**Solution : **

**To compare the given measures, convert them in to percentages of income .**

**Percent of income = [Income / Investment] x 100 % **

Percent = [250/5000] ⋅ 100% Percent of income = 5 % |
Percent = [280/7000] ⋅ 100% Percent of income = 4 % |

From the above percentages, plan A gives more income than plan B per $100 investment.

Hence, plan A is better.

After having gone through the stuff given on "Comparing rates worksheet", we hope that the students would have understood how to solve problems using unit rates.

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