Subtract 90/4 from 3/63, Solve 3/63

Subtract 90/4 from 3/63

1^st number: 3/63, 2^nd number: 22 2/4

3/63 - 90/4 is -943/42.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 4 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 63 × 4 = 252,
3/63 = 3 × 4/63 × 4 = 12/252
Likewise, for the 2nd fraction, since 4 × 63 = 252,
90/4 = 90 × 63/4 × 63 = 5670/252
Subtract the two like fractions:
12/252 - 5670/252 = 12 - 5670/252 = -5658/252
After reducing the fraction, the answer is -943/42

MathStep (Works offline)

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