Subtract 45/21 from 18/16
1st number: 1 2/16, 2nd number: 2 3/21
18/16 - 45/21 is -57/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 21 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 16 × 21 = 336,
18/16 = 18 × 21/16 × 21 = 378/336 - Likewise, for the 2nd fraction, since 21 × 16 = 336,
45/21 = 45 × 16/21 × 16 = 720/336 - Subtract the two like fractions:
378/336 - 720/336 = 378 - 720/336 = -342/336 - After reducing the fraction, the answer is -57/56
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