Subtract 1/21 from 81/36
1st number: 2 9/36, 2nd number: 1/21
81/36 - 1/21 is 185/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
81/36 = 81 × 7/36 × 7 = 567/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
1/21 = 1 × 12/21 × 12 = 12/252 - Subtract the two like fractions:
567/252 - 12/252 = 567 - 12/252 = 555/252 - After reducing the fraction, the answer is 185/84
- In mixed form: 217/84
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