Subtract 81/18 from 3/25, Solve 3/25

Subtract 81/18 from 3/25

1^st number: 3/25, 2^nd number: 4 9/18

3/25 - 81/18 is -219/50.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 18 is 450

Next, find the equivalent fraction of both fractional numbers with denominator 450
For the 1st fraction, since 25 × 18 = 450,
3/25 = 3 × 18/25 × 18 = 54/450
Likewise, for the 2nd fraction, since 18 × 25 = 450,
81/18 = 81 × 25/18 × 25 = 2025/450
Subtract the two like fractions:
54/450 - 2025/450 = 54 - 2025/450 = -1971/450
After reducing the fraction, the answer is -219/50

MathStep (Works offline)

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