Subtract 27/21 from 63/30, Solve 2 3/30

Subtract 27/21 from 63/30

1^st number: 2 3/30, 2^nd number: 1 6/21

63/30 - 27/21 is 57/70.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 30 × 7 = 210,
63/30 = 63 × 7/30 × 7 = 441/210
Likewise, for the 2nd fraction, since 21 × 10 = 210,
27/21 = 27 × 10/21 × 10 = 270/210
Subtract the two like fractions:
441/210 - 270/210 = 441 - 270/210 = 171/210
After reducing the fraction, the answer is 57/70

MathStep (Works offline)

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