Subtract 18/72 from 28/25, Solve 1 3/25

Subtract 18/72 from 28/25

1^st number: 1 3/25, 2^nd number: 18/72

28/25 - 18/72 is 87/100.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 72 is 1800

Next, find the equivalent fraction of both fractional numbers with denominator 1800
For the 1st fraction, since 25 × 72 = 1800,
28/25 = 28 × 72/25 × 72 = 2016/1800
Likewise, for the 2nd fraction, since 72 × 25 = 1800,
18/72 = 18 × 25/72 × 25 = 450/1800
Subtract the two like fractions:
2016/1800 - 450/1800 = 2016 - 450/1800 = 1566/1800
After reducing the fraction, the answer is 87/100

MathStep (Works offline)

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