Subtract 9/21 from 5/50, Solve 5/50

Subtract 9/21 from 5/50

5/50 - 9/21 is -23/70.

Find the least common denominator or LCM of the two denominators:
LCM of 50 and 21 is 1050

Next, find the equivalent fraction of both fractional numbers with denominator 1050
For the 1st fraction, since 50 × 21 = 1050,
5/50 = 5 × 21/50 × 21 = 105/1050
Likewise, for the 2nd fraction, since 21 × 50 = 1050,
9/21 = 9 × 50/21 × 50 = 450/1050
Subtract the two like fractions:
105/1050 - 450/1050 = 105 - 450/1050 = -345/1050
After reducing the fraction, the answer is -23/70

MathStep (Works offline)

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