Subtract 63/60 from 15/63, Solve 15/63

Subtract 63/60 from 15/63

1^st number: 15/63, 2^nd number: 1 3/60

15/63 - 63/60 is -341/420.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 60 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 63 × 20 = 1260,
15/63 = 15 × 20/63 × 20 = 300/1260
Likewise, for the 2nd fraction, since 60 × 21 = 1260,
63/60 = 63 × 21/60 × 21 = 1323/1260
Subtract the two like fractions:
300/1260 - 1323/1260 = 300 - 1323/1260 = -1023/1260
After reducing the fraction, the answer is -341/420

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