Subtract 45/15 from 27/63, Solve 27/63

Subtract 45/15 from 27/63

1^st number: 27/63, 2^nd number: 3 0/15

27/63 - 45/15 is -18/7.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 15 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 63 × 5 = 315,
27/63 = 27 × 5/63 × 5 = 135/315
Likewise, for the 2nd fraction, since 15 × 21 = 315,
45/15 = 45 × 21/15 × 21 = 945/315
Subtract the two like fractions:
135/315 - 945/315 = 135 - 945/315 = -810/315
After reducing the fraction, the answer is -18/7

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