Subtract 90/15 from 9/28, Solve 9/28

Subtract 90/15 from 9/28

1^st number: 9/28, 2^nd number: 6 0/15

9/28 - 90/15 is -159/28.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 15 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 28 × 15 = 420,
9/28 = 9 × 15/28 × 15 = 135/420
Likewise, for the 2nd fraction, since 15 × 28 = 420,
90/15 = 90 × 28/15 × 28 = 2520/420
Subtract the two like fractions:
135/420 - 2520/420 = 135 - 2520/420 = -2385/420
After reducing the fraction, the answer is -159/28

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