Subtract 81/49 from 84/21
1st number: 4 0/21, 2nd number: 1 32/49
84/21 - 81/49 is 115/49.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 49 is 147
Next, find the equivalent fraction of both fractional numbers with denominator 147 - For the 1st fraction, since 21 × 7 = 147,
84/21 = 84 × 7/21 × 7 = 588/147 - Likewise, for the 2nd fraction, since 49 × 3 = 147,
81/49 = 81 × 3/49 × 3 = 243/147 - Subtract the two like fractions:
588/147 - 243/147 = 588 - 243/147 = 345/147 - After reducing the fraction, the answer is 115/49
- In mixed form: 217/49
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