Subtract 21/45 from 15/49, Solve 15/49

Subtract 21/45 from 15/49

15/49 - 21/45 is -118/735.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 45 is 2205

Next, find the equivalent fraction of both fractional numbers with denominator 2205
For the 1st fraction, since 49 × 45 = 2205,
15/49 = 15 × 45/49 × 45 = 675/2205
Likewise, for the 2nd fraction, since 45 × 49 = 2205,
21/45 = 21 × 49/45 × 49 = 1029/2205
Subtract the two like fractions:
675/2205 - 1029/2205 = 675 - 1029/2205 = -354/2205
After reducing the fraction, the answer is -118/735

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