Subtract 14/63 from 20/30, Solve 20/30

Subtract 14/63 from 20/30

20/30 - 14/63 is 4/9.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 63 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 30 × 21 = 630,
20/30 = 20 × 21/30 × 21 = 420/630
Likewise, for the 2nd fraction, since 63 × 10 = 630,
14/63 = 14 × 10/63 × 10 = 140/630
Subtract the two like fractions:
420/630 - 140/630 = 420 - 140/630 = 280/630
After reducing the fraction, the answer is 4/9

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