Subtract 30/4 from 8/63, Solve 8/63

Subtract 30/4 from 8/63

1^st number: 8/63, 2^nd number: 7 2/4

8/63 - 30/4 is -929/126.

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,
8/63 = 8 × 4/63 × 4 = 32/252
Likewise, for the 2nd fraction, since 4 × 63 = 252,
30/4 = 30 × 63/4 × 63 = 1890/252
Subtract the two like fractions:
32/252 - 1890/252 = 32 - 1890/252 = -1858/252
After reducing the fraction, the answer is -929/126

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