# What is 1/8 - 4/5?

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 1/8 and 4/5.

1/8 - 4/5 = -27/40 in fraction form

1/8 - 4/5 = -0.675 in decimal form

This calculator, formula, step by step calculation and associated information to find the difference between 1/8 and 4/5 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 1/8-4/5?

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

1. LCM method

2. Cross multiplication method.

__Problem and Workout - LCM Method__

What is 1/8 minus 4/5 as a fraction by subtraction using LCM method?

step 1 Address *formula*, input parameters and values.

Input parameters and values:

1/8 & 4/5

1/8-4/5 = ?

step 2 For unequal denominators, find the LCM (least common multiple) for both denominators

The LCM for 8 and 5 is 40.

step 3 To have the common denominator, multiply the LCM with both numerator and denominator

=(1 x 40)/(8 x 40)-(4 x 40)/(5 x 40)

=5/40-32/40

=(5 - 32)/40

step 4 Find difference between numerators and rewrite it in a single form.

=-27/40

1/8-4/5=-27/40

By using LCM method, **-27/40** is the equivalent fraction by subtracting 4/5 from 1/8.

__Problem and Workout - Cross Multiplication Method__

step 1 Address formula and input values.

Input values:

1/8 & 4/5

1/8 - 4/5 = ?

step 2 Cross multiply both numerator and denominator, multiply both denominators and rewrite as below

= (1 x 5) - (4 x 8)/(8 x 5)

step 3 Simplify and rewrite the fraction

= (5 - 32)/40

1/8-4/5 = -27/40

By using cross multiplication method, **-27/40** is the difference between two fractions 1/8 and 4/5.