Subtract 21/18 from 9/50, Solve 9/50

Subtract 21/18 from 9/50

1^st number: 9/50, 2^nd number: 1 3/18

9/50 - 21/18 is -74/75.

Find the least common denominator or LCM of the two denominators:
LCM of 50 and 18 is 450

Next, find the equivalent fraction of both fractional numbers with denominator 450
For the 1st fraction, since 50 × 9 = 450,
9/50 = 9 × 9/50 × 9 = 81/450
Likewise, for the 2nd fraction, since 18 × 25 = 450,
21/18 = 21 × 25/18 × 25 = 525/450
Subtract the two like fractions:
81/450 - 525/450 = 81 - 525/450 = -444/450
After reducing the fraction, the answer is -74/75

MathStep (Works offline)

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