Subtract 42/72 from 35/12, Solve 2 11/12

Subtract 42/72 from 35/12

1^st number: 2 11/12, 2^nd number: 42/72

35/12 - 42/72 is 7/3.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 72 is 72

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 12 × 6 = 72,
35/12 = 35 × 6/12 × 6 = 210/72
Likewise, for the 2nd fraction, since 72 × 1 = 72,
42/72 = 42 × 1/72 × 1 = 42/72
Subtract the two like fractions:
210/72 - 42/72 = 210 - 42/72 = 168/72
After reducing the fraction, the answer is 7/3
In mixed form: 21/3

MathStep (Works offline)

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