# What is 3/7 - 9/10?

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 3/7 and 9/10.

3/7 - 9/10 = -33/70 in fraction form

3/7 - 9/10 = -0.4714 in decimal form

This calculator, formula, step by step calculation and associated information to find the difference between 3/7 and 9/10 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 3/7-9/10?

The below workout with step by step calculation shows how to find what is the difference between two fractions by subtracting a fraction 9/10 from 3/7. For different, unequal or unlike denominators, use any one of the following methods to find the equivalent fraction for 3/7 minus 9/10.

1. LCM method

2. Cross multiplication method.

__Problem and Workout - LCM Method__

What is 3/7 minus 9/10 as a fraction by subtraction using LCM method?

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

Input parameters and values:

3/7 & 9/10

3/7-9/10 = ?

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

The LCM for 7 and 10 is 70.

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

=(3 x 70)/(7 x 70)-(9 x 70)/(10 x 70)

=30/70-63/70

=(30 - 63)/70

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

=-33/70

3/7-9/10=-33/70

By using LCM method, **-33/70** is the equivalent fraction by subtracting 9/10 from 3/7.

__Problem and Workout - Cross Multiplication Method__

step 1 Address formula and input values.

Input values:

3/7 & 9/10

3/7 - 9/10 = ?

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

= (3 x 10) - (9 x 7)/(7 x 10)

step 3 Simplify and rewrite the fraction

= (30 - 63)/70

3/7-9/10 = -33/70

By using cross multiplication method, **-33/70** is the difference between two fractions 3/7 and 9/10.