Subtract 12/16 from 15/45, Solve 15/45

Subtract 12/16 from 15/45

15/45 - 12/16 is -5/12.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 16 is 720

Next, find the equivalent fraction of both fractional numbers with denominator 720
For the 1st fraction, since 45 × 16 = 720,
15/45 = 15 × 16/45 × 16 = 240/720
Likewise, for the 2nd fraction, since 16 × 45 = 720,
12/16 = 12 × 45/16 × 45 = 540/720
Subtract the two like fractions:
240/720 - 540/720 = 240 - 540/720 = -300/720
After reducing the fraction, the answer is -5/12

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