Subtract 4/90 from 15/50, Solve 15/50

Subtract 4/90 from 15/50

15/50 - 4/90 is 23/90.

Find the least common denominator or LCM of the two denominators:
LCM of 50 and 90 is 450

Next, find the equivalent fraction of both fractional numbers with denominator 450
For the 1st fraction, since 50 × 9 = 450,
15/50 = 15 × 9/50 × 9 = 135/450
Likewise, for the 2nd fraction, since 90 × 5 = 450,
4/90 = 4 × 5/90 × 5 = 20/450
Subtract the two like fractions:
135/450 - 20/450 = 135 - 20/450 = 115/450
After reducing the fraction, the answer is 23/90

MathStep (Works offline)

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