Subtract 70/20 from 3/63, Solve 3/63

Subtract 70/20 from 3/63

1^st number: 3/63, 2^nd number: 3 10/20

3/63 - 70/20 is -145/42.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 20 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 63 × 20 = 1260,
3/63 = 3 × 20/63 × 20 = 60/1260
Likewise, for the 2nd fraction, since 20 × 63 = 1260,
70/20 = 70 × 63/20 × 63 = 4410/1260
Subtract the two like fractions:
60/1260 - 4410/1260 = 60 - 4410/1260 = -4350/1260
After reducing the fraction, the answer is -145/42

MathStep (Works offline)

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