Subtract 81/84 from 42/2
1st number: 21 0/2, 2nd number: 81/84
42/2 - 81/84 is 561/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 2 × 42 = 84,
42/2 = 42 × 42/2 × 42 = 1764/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
81/84 = 81 × 1/84 × 1 = 81/84 - Subtract the two like fractions:
1764/84 - 81/84 = 1764 - 81/84 = 1683/84 - After reducing the fraction, the answer is 561/28
- In mixed form: 201/28
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