Subtract 1/84 from 27/20, Solve 1 7/20

Subtract 1/84 from 27/20

1^st number: 1 7/20, 2^nd number: 1/84

27/20 - 1/84 is 281/210.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 20 × 21 = 420,
27/20 = 27 × 21/20 × 21 = 567/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
1/84 = 1 × 5/84 × 5 = 5/420
Subtract the two like fractions:
567/420 - 5/420 = 567 - 5/420 = 562/420
After reducing the fraction, the answer is 281/210
In mixed form: 171/210

MathStep (Works offline)

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