Subtract 3/63 from 18/20, Solve 18/20

Subtract 3/63 from 18/20

18/20 - 3/63 is 179/210.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 63 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 20 × 63 = 1260,
18/20 = 18 × 63/20 × 63 = 1134/1260
Likewise, for the 2nd fraction, since 63 × 20 = 1260,
3/63 = 3 × 20/63 × 20 = 60/1260
Subtract the two like fractions:
1134/1260 - 60/1260 = 1134 - 60/1260 = 1074/1260
After reducing the fraction, the answer is 179/210

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