How do you write the fraction 9/21921 in simplest form?

2 Answers
Nov 28, 2016

3/737

Explanation:

9/21=(cancel(3)xx3)/(cancel(3)xx7)=3/7

Nov 28, 2016

3/7

Explanation:

We have to find a color(blue)"common factor" that will divide into both 9 and 21 and reduce the fraction.

In this case the lowest common factor is color(red)(3)

rArr9/21=(9÷3)/(21÷3)=3/7

This is usually written as shown below.

9/21=cancel(9)^3/cancel(21)^7=3/7larrcolor(red)" in simplest form"

This process is called color(blue)"cancelling"

A fraction is in color(red)"simplest form" when no other factor apart from 1 will divide into the numerator/denominator.