Subtract 42/12 from 7/50, Solve 7/50

Subtract 42/12 from 7/50

1^st number: 7/50, 2^nd number: 3 6/12

7/50 - 42/12 is -84/25.

Find the least common denominator or LCM of the two denominators:
LCM of 50 and 12 is 300

Next, find the equivalent fraction of both fractional numbers with denominator 300
For the 1st fraction, since 50 × 6 = 300,
7/50 = 7 × 6/50 × 6 = 42/300
Likewise, for the 2nd fraction, since 12 × 25 = 300,
42/12 = 42 × 25/12 × 25 = 1050/300
Subtract the two like fractions:
42/300 - 1050/300 = 42 - 1050/300 = -1008/300
After reducing the fraction, the answer is -84/25

MathStep (Works offline)

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