Subtract 30/15 from 7/14, Solve 7/14

Subtract 30/15 from 7/14

1^st number: 7/14, 2^nd number: 2 0/15

7/14 - 30/15 is -3/2.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 15 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 14 × 15 = 210,
7/14 = 7 × 15/14 × 15 = 105/210
Likewise, for the 2nd fraction, since 15 × 14 = 210,
30/15 = 30 × 14/15 × 14 = 420/210
Subtract the two like fractions:
105/210 - 420/210 = 105 - 420/210 = -315/210
After reducing the fraction, the answer is -3/2

MathStep (Works offline)

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