Subtract 9/21 from 42/3, Solve 14 0/3

Subtract 9/21 from 42/3

1^st number: 14 0/3, 2^nd number: 9/21

42/3 - 9/21 is 95/7.

Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21

Next, find the equivalent fraction of both fractional numbers with denominator 21
For the 1st fraction, since 3 × 7 = 21,
42/3 = 42 × 7/3 × 7 = 294/21
Likewise, for the 2nd fraction, since 21 × 1 = 21,
9/21 = 9 × 1/21 × 1 = 9/21
Subtract the two like fractions:
294/21 - 9/21 = 294 - 9/21 = 285/21
After reducing the fraction, the answer is 95/7
In mixed form: 134/7

MathStep (Works offline)

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