Subtract 45/12 from 12/25, Solve 12/25

Subtract 45/12 from 12/25

1^st number: 12/25, 2^nd number: 3 9/12

12/25 - 45/12 is -327/100.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 12 is 300

Next, find the equivalent fraction of both fractional numbers with denominator 300
For the 1st fraction, since 25 × 12 = 300,
12/25 = 12 × 12/25 × 12 = 144/300
Likewise, for the 2nd fraction, since 12 × 25 = 300,
45/12 = 45 × 25/12 × 25 = 1125/300
Subtract the two like fractions:
144/300 - 1125/300 = 144 - 1125/300 = -981/300
After reducing the fraction, the answer is -327/100

MathStep (Works offline)

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