Subtract 3/14 from 63/21, Solve 3 0/21

Subtract 3/14 from 63/21

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

63/21 - 3/14 is 39/14.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42

Next, find the equivalent fraction of both fractional numbers with denominator 42
For the 1st fraction, since 21 × 2 = 42,
63/21 = 63 × 2/21 × 2 = 126/42
Likewise, for the 2nd fraction, since 14 × 3 = 42,
3/14 = 3 × 3/14 × 3 = 9/42
Subtract the two like fractions:
126/42 - 9/42 = 126 - 9/42 = 117/42
After reducing the fraction, the answer is 39/14
In mixed form: 211/14

MathStep (Works offline)

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