Subtract 28/80 from 15/49, Solve 15/49

Subtract 28/80 from 15/49

15/49 - 28/80 is -43/980.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 80 is 3920

Next, find the equivalent fraction of both fractional numbers with denominator 3920
For the 1st fraction, since 49 × 80 = 3920,
15/49 = 15 × 80/49 × 80 = 1200/3920
Likewise, for the 2nd fraction, since 80 × 49 = 3920,
28/80 = 28 × 49/80 × 49 = 1372/3920
Subtract the two like fractions:
1200/3920 - 1372/3920 = 1200 - 1372/3920 = -172/3920
After reducing the fraction, the answer is -43/980

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