Subtract 63/16 from 18/21
1st number: 18/21, 2nd number: 3 15/16
18/21 - 63/16 is -345/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 16 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 21 × 16 = 336,
18/21 = 18 × 16/21 × 16 = 288/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
63/16 = 63 × 21/16 × 21 = 1323/336 - Subtract the two like fractions:
288/336 - 1323/336 = 288 - 1323/336 = -1035/336 - After reducing the fraction, the answer is -345/112
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