Subtract 28/64 from 15/49, Solve 15/49

Subtract 28/64 from 15/49

15/49 - 28/64 is -103/784.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 64 is 3136

Next, find the equivalent fraction of both fractional numbers with denominator 3136
For the 1st fraction, since 49 × 64 = 3136,
15/49 = 15 × 64/49 × 64 = 960/3136
Likewise, for the 2nd fraction, since 64 × 49 = 3136,
28/64 = 28 × 49/64 × 49 = 1372/3136
Subtract the two like fractions:
960/3136 - 1372/3136 = 960 - 1372/3136 = -412/3136
After reducing the fraction, the answer is -103/784

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