What is 5/9 - 4/8?

The below workout with step by step calculation shows how to find what is the difference between two fractions by subtracting a fraction 4/8 from 5/9. For different, unequal or unlike denominators, use any one of the following methods to find the equivalent fraction for 5/9 minus 4/8.
1. LCM method
2. Cross multiplication method.

Problem and Workout - LCM Method
What is 5/9 minus 4/8 as a fraction by subtraction using LCM method?

step 1 Address formula, input parameters and values.
Input parameters and values:
5/9 & 4/8
5/9-4/8 = ?

step 2 For unequal denominators, find the LCM (least common multiple) for both denominators
The LCM for 9 and 8 is 72.

step 3 To have the common denominator, multiply the LCM with both numerator and denominator
=(5 x 72)/(9 x 72)-(4 x 72)/(8 x 72)
=40/72-36/72
=(40 - 36)/72

step 4 Find difference between numerators and rewrite it in a single form.
= 4/72
=1/18
5/9-4/8=1/18

By using LCM method, 1/18 is the equivalent fraction by subtracting 4/8 from 5/9.

Problem and Workout - Cross Multiplication Method
step 1 Address formula and input values.
Input values:
5/9 & 4/8
5/9 - 4/8 = ?

step 2 Cross multiply both numerator and denominator, multiply both denominators and rewrite as below
= (5 x 8) - (4 x 9)/(9 x 8)

step 3 Simplify and rewrite the fraction
= (40 - 36)/72
= 4/72
= 1/18
5/9-4/8 = 1/18
By using cross multiplication method, 1/18 is the difference between two fractions 5/9 and 4/8.