Subtract 81/21 from 60/18
1st number: 3 6/18, 2nd number: 3 18/21
60/18 - 81/21 is -11/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
60/18 = 60 × 7/18 × 7 = 420/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
81/21 = 81 × 6/21 × 6 = 486/126 - Subtract the two like fractions:
420/126 - 486/126 = 420 - 486/126 = -66/126 - After reducing the fraction, the answer is -11/21
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