Subtract 15/70 from 20/63, Solve 20/63

Subtract 15/70 from 20/63

20/63 - 15/70 is 13/126.

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,
20/63 = 20 × 10/63 × 10 = 200/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
15/70 = 15 × 9/70 × 9 = 135/630
Subtract the two like fractions:
200/630 - 135/630 = 200 - 135/630 = 65/630
After reducing the fraction, the answer is 13/126

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