Subtract 7/80 from 21/63, Solve 21/63

Subtract 7/80 from 21/63

21/63 - 7/80 is 59/240.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 80 is 5040

Next, find the equivalent fraction of both fractional numbers with denominator 5040
For the 1st fraction, since 63 × 80 = 5040,
21/63 = 21 × 80/63 × 80 = 1680/5040
Likewise, for the 2nd fraction, since 80 × 63 = 5040,
7/80 = 7 × 63/80 × 63 = 441/5040
Subtract the two like fractions:
1680/5040 - 441/5040 = 1680 - 441/5040 = 1239/5040
After reducing the fraction, the answer is 59/240

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