Subtract 4/81 from 9/21
9/21 - 4/81 is 215/567.
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,
9/21 = 9 × 27/21 × 27 = 243/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
4/81 = 4 × 7/81 × 7 = 28/567 - Subtract the two like fractions:
243/567 - 28/567 = 243 - 28/567 = 215/567
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