Subtract 21/63 from 14/8, Solve 1 6/8

Subtract 21/63 from 14/8

1^st number: 1 6/8, 2^nd number: 21/63

14/8 - 21/63 is 17/12.

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

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 8 × 63 = 504,
14/8 = 14 × 63/8 × 63 = 882/504
Likewise, for the 2nd fraction, since 63 × 8 = 504,
21/63 = 21 × 8/63 × 8 = 168/504
Subtract the two like fractions:
882/504 - 168/504 = 882 - 168/504 = 714/504
After reducing the fraction, the answer is 17/12
In mixed form: 15/12

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