Subtract 7/30 from 28/35, Solve 28/35

Subtract 7/30 from 28/35

28/35 - 7/30 is 17/30.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 30 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 35 × 6 = 210,
28/35 = 28 × 6/35 × 6 = 168/210
Likewise, for the 2nd fraction, since 30 × 7 = 210,
7/30 = 7 × 7/30 × 7 = 49/210
Subtract the two like fractions:
168/210 - 49/210 = 168 - 49/210 = 119/210
After reducing the fraction, the answer is 17/30

MathStep (Works offline)

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