Subtract 10/8 from 4/30, Solve 4/30

Subtract 10/8 from 4/30

1^st number: 4/30, 2^nd number: 1 2/8

4/30 - 10/8 is -67/60.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 8 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 30 × 4 = 120,
4/30 = 4 × 4/30 × 4 = 16/120
Likewise, for the 2nd fraction, since 8 × 15 = 120,
10/8 = 10 × 15/8 × 15 = 150/120
Subtract the two like fractions:
16/120 - 150/120 = 16 - 150/120 = -134/120
After reducing the fraction, the answer is -67/60

MathStep (Works offline)

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