Subtract 63/4 from 30/63, Solve 30/63

Subtract 63/4 from 30/63

1^st number: 30/63, 2^nd number: 15 3/4

30/63 - 63/4 is -1283/84.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 4 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 63 × 4 = 252,
30/63 = 30 × 4/63 × 4 = 120/252
Likewise, for the 2nd fraction, since 4 × 63 = 252,
63/4 = 63 × 63/4 × 63 = 3969/252
Subtract the two like fractions:
120/252 - 3969/252 = 120 - 3969/252 = -3849/252
After reducing the fraction, the answer is -1283/84

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