Subtract 81/40 from 90/48
1st number: 1 42/48, 2nd number: 2 1/40
90/48 - 81/40 is -3/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 40 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 48 × 5 = 240,
90/48 = 90 × 5/48 × 5 = 450/240 - Likewise, for the 2nd fraction, since 40 × 6 = 240,
81/40 = 81 × 6/40 × 6 = 486/240 - Subtract the two like fractions:
450/240 - 486/240 = 450 - 486/240 = -36/240 - After reducing the fraction, the answer is -3/20
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