Subtract 50/84 from 9/30, Solve 9/30

Subtract 50/84 from 9/30

9/30 - 50/84 is -31/105.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 84 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 30 × 14 = 420,
9/30 = 9 × 14/30 × 14 = 126/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
50/84 = 50 × 5/84 × 5 = 250/420
Subtract the two like fractions:
126/420 - 250/420 = 126 - 250/420 = -124/420
After reducing the fraction, the answer is -31/105

MathStep (Works offline)

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