# What is 2/9 - 9/8?

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 2/9 and 9/8.

2/9 - 9/8 = -65/72 in fraction form

2/9 - 9/8 = -0.9028 in decimal form

This calculator, formula, step by step calculation and associated information to find the difference between 2/9 and 9/8 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 2/9-9/8?

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

1. LCM method

2. Cross multiplication method.

__Problem and Workout - LCM Method__

What is 2/9 minus 9/8 as a fraction by subtraction using LCM method?

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

Input parameters and values:

2/9 & 9/8

2/9-9/8 = ?

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

=(2 x 72)/(9 x 72)-(9 x 72)/(8 x 72)

=16/72-81/72

=(16 - 81)/72

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

=-65/72

2/9-9/8=-65/72

By using LCM method, **-65/72** is the equivalent fraction by subtracting 9/8 from 2/9.

__Problem and Workout - Cross Multiplication Method__

step 1 Address formula and input values.

Input values:

2/9 & 9/8

2/9 - 9/8 = ?

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

= (2 x 8) - (9 x 9)/(9 x 8)

step 3 Simplify and rewrite the fraction

= (16 - 81)/72

2/9-9/8 = -65/72

By using cross multiplication method, **-65/72** is the difference between two fractions 2/9 and 9/8.