Subtraction Formula Solutions

In this page you can find subtraction formula solutions.Here you can see solution for the addition problem.This method will be very simple for adding two fractions without taking L.C.M

Question 1:

Subtract  1⁄8 - 2⁄7

Solution:

               =  1⁄8 - 2⁄7

               =  [(1x7) - (2x8)] /(8x7)  

               =  [7-16]/56

               = -9/56


Question 2:

Subtract  3⁄7 - 2⁄5

Solution:

               =  3⁄7 - 2⁄5

               =  [(3x5) - (2x7)] /(7x5)  

               =  [15-14]/35

               =  1/35

Question 3:

Subtract  2⁄5 - 4⁄9

Solution:

               =  2⁄5 - 4⁄9

               =  [(2x9) - (4x5)] /(9x5)  

               =  [18-20]/45

               =  -2/45


Question 4:

Subtract  7⁄9 - 2⁄7

Solution:

               =  7⁄9 - 2⁄7

               =  [(7x7) - (2x9)] /(9x7)  

               =  [49-18]/63

               =  31/63


Question 5:

Subtract  1⁄2 - 3⁄5

Solution:

               =  1⁄2 - 3⁄5

               =  [(1x5) - (3x2)] /(2x5)  

               =  [5-6]/10

               =  -1/10





subtraction formula solutions to subtraction formulas