Subtract 3/8 from 72/63, Solve 1 9/63

Subtract 3/8 from 72/63

1^st number: 1 9/63, 2^nd number: 3/8

72/63 - 3/8 is 43/56.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 8 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 63 × 8 = 504,
72/63 = 72 × 8/63 × 8 = 576/504
Likewise, for the 2nd fraction, since 8 × 63 = 504,
3/8 = 3 × 63/8 × 63 = 189/504
Subtract the two like fractions:
576/504 - 189/504 = 576 - 189/504 = 387/504
After reducing the fraction, the answer is 43/56

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