Subtract 15/70 from 10/63, Solve 10/63

Subtract 15/70 from 10/63

10/63 - 15/70 is -1/18.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 70 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 63 × 10 = 630,
10/63 = 10 × 10/63 × 10 = 100/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
15/70 = 15 × 9/70 × 9 = 135/630
Subtract the two like fractions:
100/630 - 135/630 = 100 - 135/630 = -35/630
After reducing the fraction, the answer is -1/18

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