Subtract 27/72 from 84/10, Solve 8 4/10

Subtract 27/72 from 84/10

1^st number: 8 4/10, 2^nd number: 27/72

84/10 - 27/72 is 321/40.

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

Next, find the equivalent fraction of both fractional numbers with denominator 360
For the 1st fraction, since 10 × 36 = 360,
84/10 = 84 × 36/10 × 36 = 3024/360
Likewise, for the 2nd fraction, since 72 × 5 = 360,
27/72 = 27 × 5/72 × 5 = 135/360
Subtract the two like fractions:
3024/360 - 135/360 = 3024 - 135/360 = 2889/360
After reducing the fraction, the answer is 321/40
In mixed form: 81/40

MathStep (Works offline)

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