Subtract 6/63 from 80/60, Solve 1 20/60

Subtract 6/63 from 80/60

1^st number: 1 20/60, 2^nd number: 6/63

80/60 - 6/63 is 26/21.

Find the least common denominator or LCM of the two denominators:
LCM of 60 and 63 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 60 × 21 = 1260,
80/60 = 80 × 21/60 × 21 = 1680/1260
Likewise, for the 2nd fraction, since 63 × 20 = 1260,
6/63 = 6 × 20/63 × 20 = 120/1260
Subtract the two like fractions:
1680/1260 - 120/1260 = 1680 - 120/1260 = 1560/1260
After reducing the fraction, the answer is 26/21
In mixed form: 15/21

MathStep (Works offline)

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