Subtract 27/30 from 80/4, Solve 20 0/4

Subtract 27/30 from 80/4

1^st number: 20 0/4, 2^nd number: 27/30

80/4 - 27/30 is 191/10.

Find the least common denominator or LCM of the two denominators:
LCM of 4 and 30 is 60

Next, find the equivalent fraction of both fractional numbers with denominator 60
For the 1st fraction, since 4 × 15 = 60,
80/4 = 80 × 15/4 × 15 = 1200/60
Likewise, for the 2nd fraction, since 30 × 2 = 60,
27/30 = 27 × 2/30 × 2 = 54/60
Subtract the two like fractions:
1200/60 - 54/60 = 1200 - 54/60 = 1146/60
After reducing the fraction, the answer is 191/10
In mixed form: 191/10

MathStep (Works offline)

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