Subtract 45/63 from 7/15, Solve 7/15

Subtract 45/63 from 7/15

7/15 - 45/63 is -26/105.

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

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 15 × 21 = 315,
7/15 = 7 × 21/15 × 21 = 147/315
Likewise, for the 2nd fraction, since 63 × 5 = 315,
45/63 = 45 × 5/63 × 5 = 225/315
Subtract the two like fractions:
147/315 - 225/315 = 147 - 225/315 = -78/315
After reducing the fraction, the answer is -26/105

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