Subtract 7/5 from 14/42, Solve 14/42

Subtract 7/5 from 14/42

1^st number: 14/42, 2^nd number: 1 2/5

14/42 - 7/5 is -16/15.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 5 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 42 × 5 = 210,
14/42 = 14 × 5/42 × 5 = 70/210
Likewise, for the 2nd fraction, since 5 × 42 = 210,
7/5 = 7 × 42/5 × 42 = 294/210
Subtract the two like fractions:
70/210 - 294/210 = 70 - 294/210 = -224/210
After reducing the fraction, the answer is -16/15

MathStep (Works offline)

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