# What is 7/9 - 2/5? getcalc.com's two fractions subtraction calculator is an online basic math function tool to find what's the equivalent fraction for difference between two fractional numbers with different, unequal or unlike denominators 7/9 and 2/5.

7/9 - 2/5 = 17/45 in fraction form

7/9 - 2/5 = 0.3778 in decimal form
This calculator, formula, step by step calculation and associated information to find the difference between 7/9 and 2/5 may help students, teachers, parents or professionals to learn, teach, practice or verify such two fractions subtraction calculations efficiently.

## How to Find Equivalent Fraction for 7/9-2/5?

The below workout with step by step calculation shows how to find what is the difference between two fractions by subtracting a fraction 2/5 from 7/9. For different, unequal or unlike denominators, use any one of the following methods to find the equivalent fraction for 7/9 minus 2/5.
1. LCM method
2. Cross multiplication method.

Problem and Workout - LCM Method
What is 7/9 minus 2/5 as a fraction by subtraction using LCM method?

step 1 Address formula, input parameters and values.
Input parameters and values:
7/9 & 2/5
7/9-2/5 = ?

step 2 For unequal denominators, find the LCM (least common multiple) for both denominators
The LCM for 9 and 5 is 45.

step 3 To have the common denominator, multiply the LCM with both numerator and denominator
=(7 x 45)/(9 x 45)-(2 x 45)/(5 x 45)
=35/45-18/45
=(35 - 18)/45

step 4 Find difference between numerators and rewrite it in a single form.
=17/45
7/9-2/5=17/45

By using LCM method, 17/45 is the equivalent fraction by subtracting 2/5 from 7/9.

Problem and Workout - Cross Multiplication Method
step 1 Address formula and input values.
Input values:
7/9 & 2/5
7/9 - 2/5 = ?

step 2 Cross multiply both numerator and denominator, multiply both denominators and rewrite as below
= (7 x 5) - (2 x 9)/(9 x 5)

step 3 Simplify and rewrite the fraction
= (35 - 18)/45
7/9-2/5 = 17/45
By using cross multiplication method, 17/45 is the difference between two fractions 7/9 and 2/5. 