Subtract 81/40 from 14/21
1st number: 14/21, 2nd number: 2 1/40
14/21 - 81/40 is -163/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 21 × 40 = 840,
14/21 = 14 × 40/21 × 40 = 560/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
81/40 = 81 × 21/40 × 21 = 1701/840 - Subtract the two like fractions:
560/840 - 1701/840 = 560 - 1701/840 = -1141/840 - After reducing the fraction, the answer is -163/120
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