Subtract 63/16 from 21/9, Solve 2 3/9

Subtract 63/16 from 21/9

1^st number: 2 3/9, 2^nd number: 3 15/16

21/9 - 63/16 is -77/48.

Find the least common denominator or LCM of the two denominators:
LCM of 9 and 16 is 144

Next, find the equivalent fraction of both fractional numbers with denominator 144
For the 1st fraction, since 9 × 16 = 144,
21/9 = 21 × 16/9 × 16 = 336/144
Likewise, for the 2nd fraction, since 16 × 9 = 144,
63/16 = 63 × 9/16 × 9 = 567/144
Subtract the two like fractions:
336/144 - 567/144 = 336 - 567/144 = -231/144
After reducing the fraction, the answer is -77/48

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