Subtract 81/20 from 3/84
1st number: 3/84, 2nd number: 4 1/20
3/84 - 81/20 is -281/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
3/84 = 3 × 5/84 × 5 = 15/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
81/20 = 81 × 21/20 × 21 = 1701/420 - Subtract the two like fractions:
15/420 - 1701/420 = 15 - 1701/420 = -1686/420 - After reducing the fraction, the answer is -281/70
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