Subtract 20/24 from 15/63, Solve 15/63

Subtract 20/24 from 15/63

15/63 - 20/24 is -25/42.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 24 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 63 × 8 = 504,
15/63 = 15 × 8/63 × 8 = 120/504
Likewise, for the 2nd fraction, since 24 × 21 = 504,
20/24 = 20 × 21/24 × 21 = 420/504
Subtract the two like fractions:
120/504 - 420/504 = 120 - 420/504 = -300/504
After reducing the fraction, the answer is -25/42

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