Subtract 70/20 from 4/63, Solve 4/63

Subtract 70/20 from 4/63

1^st number: 4/63, 2^nd number: 3 10/20

4/63 - 70/20 is -433/126.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 20 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 63 × 20 = 1260,
4/63 = 4 × 20/63 × 20 = 80/1260
Likewise, for the 2nd fraction, since 20 × 63 = 1260,
70/20 = 70 × 63/20 × 63 = 4410/1260
Subtract the two like fractions:
80/1260 - 4410/1260 = 80 - 4410/1260 = -4330/1260
After reducing the fraction, the answer is -433/126

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