Subtract 63/42 from 63/16, Solve 3 15/16

Subtract 63/42 from 63/16

1^st number: 3 15/16, 2^nd number: 1 21/42

63/16 - 63/42 is 39/16.

Find the least common denominator or LCM of the two denominators:
LCM of 16 and 42 is 336

Next, find the equivalent fraction of both fractional numbers with denominator 336
For the 1st fraction, since 16 × 21 = 336,
63/16 = 63 × 21/16 × 21 = 1323/336
Likewise, for the 2nd fraction, since 42 × 8 = 336,
63/42 = 63 × 8/42 × 8 = 504/336
Subtract the two like fractions:
1323/336 - 504/336 = 1323 - 504/336 = 819/336
After reducing the fraction, the answer is 39/16
In mixed form: 27/16

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