Subtract 3/63 from 30/70, Solve 30/70

Subtract 3/63 from 30/70

30/70 - 3/63 is 8/21.

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

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 70 × 9 = 630,
30/70 = 30 × 9/70 × 9 = 270/630
Likewise, for the 2nd fraction, since 63 × 10 = 630,
3/63 = 3 × 10/63 × 10 = 30/630
Subtract the two like fractions:
270/630 - 30/630 = 270 - 30/630 = 240/630
After reducing the fraction, the answer is 8/21

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