Subtract 15/30 from 10/28, Solve 10/28

Subtract 15/30 from 10/28

10/28 - 15/30 is -1/7.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 30 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 28 × 15 = 420,
10/28 = 10 × 15/28 × 15 = 150/420
Likewise, for the 2nd fraction, since 30 × 14 = 420,
15/30 = 15 × 14/30 × 14 = 210/420
Subtract the two like fractions:
150/420 - 210/420 = 150 - 210/420 = -60/420
After reducing the fraction, the answer is -1/7

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