Subtract 20/5 from 7/63, Solve 7/63

Subtract 20/5 from 7/63

1^st number: 7/63, 2^nd number: 4 0/5

7/63 - 20/5 is -35/9.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 5 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 63 × 5 = 315,
7/63 = 7 × 5/63 × 5 = 35/315
Likewise, for the 2nd fraction, since 5 × 63 = 315,
20/5 = 20 × 63/5 × 63 = 1260/315
Subtract the two like fractions:
35/315 - 1260/315 = 35 - 1260/315 = -1225/315
After reducing the fraction, the answer is -35/9

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