Subtract 9/16 from 9/21
9/21 - 9/16 is -15/112.
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,
9/21 = 9 × 16/21 × 16 = 144/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
9/16 = 9 × 21/16 × 21 = 189/336 - Subtract the two like fractions:
144/336 - 189/336 = 144 - 189/336 = -45/336 - After reducing the fraction, the answer is -15/112
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