Subtract 4/48 from 15/42, Solve 15/42

Subtract 4/48 from 15/42

15/42 - 4/48 is 23/84.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 48 is 336

Next, find the equivalent fraction of both fractional numbers with denominator 336
For the 1st fraction, since 42 × 8 = 336,
15/42 = 15 × 8/42 × 8 = 120/336
Likewise, for the 2nd fraction, since 48 × 7 = 336,
4/48 = 4 × 7/48 × 7 = 28/336
Subtract the two like fractions:
120/336 - 28/336 = 120 - 28/336 = 92/336
After reducing the fraction, the answer is 23/84

MathStep (Works offline)

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