Subtract 63/42 from 5/70, Solve 5/70

Subtract 63/42 from 5/70

1^st number: 5/70, 2^nd number: 1 21/42

5/70 - 63/42 is -10/7.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 42 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 70 × 3 = 210,
5/70 = 5 × 3/70 × 3 = 15/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
63/42 = 63 × 5/42 × 5 = 315/210
Subtract the two like fractions:
15/210 - 315/210 = 15 - 315/210 = -300/210
After reducing the fraction, the answer is -10/7

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