Subtract 81/84 from 84/42
1st number: 2 0/42, 2nd number: 81/84
84/42 - 81/84 is 29/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
84/42 = 84 × 2/42 × 2 = 168/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
81/84 = 81 × 1/84 × 1 = 81/84 - Subtract the two like fractions:
168/84 - 81/84 = 168 - 81/84 = 87/84 - After reducing the fraction, the answer is 29/28
- In mixed form: 11/28
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