Subtract 63/40 from 3/30, Solve 3/30

Subtract 63/40 from 3/30

1^st number: 3/30, 2^nd number: 1 23/40

3/30 - 63/40 is -59/40.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 40 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 30 × 4 = 120,
3/30 = 3 × 4/30 × 4 = 12/120
Likewise, for the 2nd fraction, since 40 × 3 = 120,
63/40 = 63 × 3/40 × 3 = 189/120
Subtract the two like fractions:
12/120 - 189/120 = 12 - 189/120 = -177/120
After reducing the fraction, the answer is -59/40

MathStep (Works offline)

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