Subtract 42/48 from 28/18, Solve 1 10/18

Subtract 42/48 from 28/18

1^st number: 1 10/18, 2^nd number: 42/48

28/18 - 42/48 is 49/72.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 48 is 144

Next, find the equivalent fraction of both fractional numbers with denominator 144
For the 1st fraction, since 18 × 8 = 144,
28/18 = 28 × 8/18 × 8 = 224/144
Likewise, for the 2nd fraction, since 48 × 3 = 144,
42/48 = 42 × 3/48 × 3 = 126/144
Subtract the two like fractions:
224/144 - 126/144 = 224 - 126/144 = 98/144
After reducing the fraction, the answer is 49/72

MathStep (Works offline)

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