Answers

The simplest form of -9/18 is -1/2.

Steps to simplifying fractions

1. Find the GCD (or HCF) of the absolute values of both numerator and denominator
   GCD of 9 and 18 is 9
2. Divide both the numerator and denominator by the GCD
   -9 ÷ 9/18 ÷ 9
3. Reduced fraction: -1/2
   Therefore, -9/18 simplified to lowest terms is -1/2.

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Fractions Simplifier