Subtract 84/4 from 16/21
1st number: 16/21, 2nd number: 21 0/4
16/21 - 84/4 is -425/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
16/21 = 16 × 4/21 × 4 = 64/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
84/4 = 84 × 21/4 × 21 = 1764/84 - Subtract the two like fractions:
64/84 - 1764/84 = 64 - 1764/84 = -1700/84 - After reducing the fraction, the answer is -425/21
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