Subtract 27/35 from 21/5, Solve 4 1/5

Subtract 27/35 from 21/5

1^st number: 4 1/5, 2^nd number: 27/35

21/5 - 27/35 is 24/7.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 35 is 35

Next, find the equivalent fraction of both fractional numbers with denominator 35
For the 1st fraction, since 5 × 7 = 35,
21/5 = 21 × 7/5 × 7 = 147/35
Likewise, for the 2nd fraction, since 35 × 1 = 35,
27/35 = 27 × 1/35 × 1 = 27/35
Subtract the two like fractions:
147/35 - 27/35 = 147 - 27/35 = 120/35
After reducing the fraction, the answer is 24/7
In mixed form: 33/7

MathStep (Works offline)

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