Subtract 3/40 from 18/63, Solve 18/63

Subtract 3/40 from 18/63

18/63 - 3/40 is 59/280.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 40 is 2520

Next, find the equivalent fraction of both fractional numbers with denominator 2520
For the 1st fraction, since 63 × 40 = 2520,
18/63 = 18 × 40/63 × 40 = 720/2520
Likewise, for the 2nd fraction, since 40 × 63 = 2520,
3/40 = 3 × 63/40 × 63 = 189/2520
Subtract the two like fractions:
720/2520 - 189/2520 = 720 - 189/2520 = 531/2520
After reducing the fraction, the answer is 59/280

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