Subtract 48/72 from 21/2, Solve 10 1/2

Subtract 48/72 from 21/2

1^st number: 10 1/2, 2^nd number: 48/72

21/2 - 48/72 is 59/6.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 72 is 72

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 2 × 36 = 72,
21/2 = 21 × 36/2 × 36 = 756/72
Likewise, for the 2nd fraction, since 72 × 1 = 72,
48/72 = 48 × 1/72 × 1 = 48/72
Subtract the two like fractions:
756/72 - 48/72 = 756 - 48/72 = 708/72
After reducing the fraction, the answer is 59/6
In mixed form: 95/6

MathStep (Works offline)

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