Subtract 9/32 from 12/84, Solve 12/84

Subtract 9/32 from 12/84

12/84 - 9/32 is -31/224.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 32 is 672

Next, find the equivalent fraction of both fractional numbers with denominator 672
For the 1st fraction, since 84 × 8 = 672,
12/84 = 12 × 8/84 × 8 = 96/672
Likewise, for the 2nd fraction, since 32 × 21 = 672,
9/32 = 9 × 21/32 × 21 = 189/672
Subtract the two like fractions:
96/672 - 189/672 = 96 - 189/672 = -93/672
After reducing the fraction, the answer is -31/224

MathStep (Works offline)

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