Subtract 20/10 from 1/72, Solve 1/72

Subtract 20/10 from 1/72

1^st number: 1/72, 2^nd number: 2 0/10

1/72 - 20/10 is -143/72.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 10 is 360

Next, find the equivalent fraction of both fractional numbers with denominator 360
For the 1st fraction, since 72 × 5 = 360,
1/72 = 1 × 5/72 × 5 = 5/360
Likewise, for the 2nd fraction, since 10 × 36 = 360,
20/10 = 20 × 36/10 × 36 = 720/360
Subtract the two like fractions:
5/360 - 720/360 = 5 - 720/360 = -715/360
After reducing the fraction, the answer is -143/72

MathStep (Works offline)

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