Subtract 28/8 from 24/42, Solve 24/42

Subtract 28/8 from 24/42

1^st number: 24/42, 2^nd number: 3 4/8

24/42 - 28/8 is -41/14.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 8 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 42 × 4 = 168,
24/42 = 24 × 4/42 × 4 = 96/168
Likewise, for the 2nd fraction, since 8 × 21 = 168,
28/8 = 28 × 21/8 × 21 = 588/168
Subtract the two like fractions:
96/168 - 588/168 = 96 - 588/168 = -492/168
After reducing the fraction, the answer is -41/14

MathStep (Works offline)

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