Subtract 6/81 from 16/21
16/21 - 6/81 is 130/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 21 × 27 = 567,
16/21 = 16 × 27/21 × 27 = 432/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
6/81 = 6 × 7/81 × 7 = 42/567 - Subtract the two like fractions:
432/567 - 42/567 = 432 - 42/567 = 390/567 - After reducing the fraction, the answer is 130/189
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