Subtract 2/21 from 70/6, Solve 11 4/6

Subtract 2/21 from 70/6

1^st number: 11 4/6, 2^nd number: 2/21

70/6 - 2/21 is 81/7.

Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42

Next, find the equivalent fraction of both fractional numbers with denominator 42
For the 1st fraction, since 6 × 7 = 42,
70/6 = 70 × 7/6 × 7 = 490/42
Likewise, for the 2nd fraction, since 21 × 2 = 42,
2/21 = 2 × 2/21 × 2 = 4/42
Subtract the two like fractions:
490/42 - 4/42 = 490 - 4/42 = 486/42
After reducing the fraction, the answer is 81/7
In mixed form: 114/7

MathStep (Works offline)

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