Subtract 4/16 from 1/21
1/21 - 4/16 is -17/84.
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,
1/21 = 1 × 16/21 × 16 = 16/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
4/16 = 4 × 21/16 × 21 = 84/336 - Subtract the two like fractions:
16/336 - 84/336 = 16 - 84/336 = -68/336 - After reducing the fraction, the answer is -17/84
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