Subtract 15/80 from 15/5, Solve 3 0/5

Subtract 15/80 from 15/5

1^st number: 3 0/5, 2^nd number: 15/80

15/5 - 15/80 is 45/16.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 80 is 80

Next, find the equivalent fraction of both fractional numbers with denominator 80
For the 1st fraction, since 5 × 16 = 80,
15/5 = 15 × 16/5 × 16 = 240/80
Likewise, for the 2nd fraction, since 80 × 1 = 80,
15/80 = 15 × 1/80 × 1 = 15/80
Subtract the two like fractions:
240/80 - 15/80 = 240 - 15/80 = 225/80
After reducing the fraction, the answer is 45/16
In mixed form: 213/16

MathStep (Works offline)

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