Subtract 30/75 from 10/28, Solve 10/28

Subtract 30/75 from 10/28

10/28 - 30/75 is -3/70.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 75 is 2100

Next, find the equivalent fraction of both fractional numbers with denominator 2100
For the 1st fraction, since 28 × 75 = 2100,
10/28 = 10 × 75/28 × 75 = 750/2100
Likewise, for the 2nd fraction, since 75 × 28 = 2100,
30/75 = 30 × 28/75 × 28 = 840/2100
Subtract the two like fractions:
750/2100 - 840/2100 = 750 - 840/2100 = -90/2100
After reducing the fraction, the answer is -3/70

MathStep (Works offline)

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