Subtract 30/5 from 3/72, Solve 3/72

Subtract 30/5 from 3/72

1^st number: 3/72, 2^nd number: 6 0/5

3/72 - 30/5 is -143/24.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 5 is 360

Next, find the equivalent fraction of both fractional numbers with denominator 360
For the 1st fraction, since 72 × 5 = 360,
3/72 = 3 × 5/72 × 5 = 15/360
Likewise, for the 2nd fraction, since 5 × 72 = 360,
30/5 = 30 × 72/5 × 72 = 2160/360
Subtract the two like fractions:
15/360 - 2160/360 = 15 - 2160/360 = -2145/360
After reducing the fraction, the answer is -143/24

MathStep (Works offline)

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