# What is 3/8 - 9? getcalc.com's two fractions subtraction calculator is an online basic math function tool to find what's the equivalent fraction for difference between fraction and a whole number, 3/8 minus 9. In mathematics, every integer is a rational number, hence a whole number 9 can be written as 9/1.
3/8 - 9 = -69/8 in fraction form

3/8 - 9 = -8.625 in decimal form
This calculator, formula, step by step calculation and associated information to find the difference between 3/8 and 9 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 3/8-9?

The below workout with step by step calculation shows how to find the difference between fraction and a whole number by subtracting 9 from 3/8. use any one of the following methods to find the equivalent fraction for 3/8 minus 9.
1. LCM method
2. Cross multiplication method.

Problem and Workout - LCM Method
What is 3/8 minus 9 as a fraction by subtraction using LCM method?

step 1 Address formula, input parameters and values.
Input parameters and values:
3/8 & 9/1
3/8-9 = ?

step 2 For unequal denominators, find the LCM (least common multiple) for both denominators
The LCM for 8 and 1 is 8.

step 3 To have the common denominator, multiply the LCM with both numerator and denominator
=(3 x 8)/(8 x 8)-(9 x 8)/(1 x 8)
=3/8-72/8
=(3 - 72)/8

step 4 Find difference between numerators and rewrite it in a single form.
=-69/8
3/8-9=-69/8

By using LCM method, -69/8 is the equivalent fraction by subtracting 9 from 3/8.

Problem and Workout - Cross Multiplication Method
step 1 Address formula and input values.
Input values:
3/8 & 9/1
3/8 - 9 = ?

step 2 Cross multiply both numerator and denominator, multiply both denominators and rewrite as below
= (3 x 1) - (9 x 8)/(8 x 1)

step 3 Simplify and rewrite the fraction
= (3 - 72)/8
3/8-9 = -69/8
By using cross multiplication method, -69/8 is the difference between two fractions 3/8 and 9. 