# What is 1/7 - 1/8? 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 1/7 and 1/8.

1/7 - 1/8 = 1/56 in fraction form

1/7 - 1/8 = 0.0179 in decimal form
This calculator, formula, step by step calculation and associated information to find the difference between 1/7 and 1/8 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 1/7-1/8?

The below workout with step by step calculation shows how to find what is the difference between two fractions by subtracting a fraction 1/8 from 1/7. For different, unequal or unlike denominators, use any one of the following methods to find the equivalent fraction for 1/7 minus 1/8.
1. LCM method
2. Cross multiplication method.

Problem and Workout - LCM Method
What is 1/7 minus 1/8 as a fraction by subtraction using LCM method?

step 1 Address formula, input parameters and values.
Input parameters and values:
1/7 & 1/8
1/7-1/8 = ?

step 2 For unequal denominators, find the LCM (least common multiple) for both denominators
The LCM for 7 and 8 is 56.

step 3 To have the common denominator, multiply the LCM with both numerator and denominator
=(1 x 56)/(7 x 56)-(1 x 56)/(8 x 56)
=8/56-7/56
=(8 - 7)/56

step 4 Find difference between numerators and rewrite it in a single form.
=1/56
1/7-1/8=1/56

By using LCM method, 1/56 is the equivalent fraction by subtracting 1/8 from 1/7.

Problem and Workout - Cross Multiplication Method
step 1 Address formula and input values.
Input values:
1/7 & 1/8
1/7 - 1/8 = ?

step 2 Cross multiply both numerator and denominator, multiply both denominators and rewrite as below
= (1 x 8) - (1 x 7)/(7 x 8)

step 3 Simplify and rewrite the fraction
= (8 - 7)/56
1/7-1/8 = 1/56
By using cross multiplication method, 1/56 is the difference between two fractions 1/7 and 1/8. 