Subtract 90/56 from 20/15
1st number: 1 5/15, 2nd number: 1 34/56
20/15 - 90/56 is -23/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 15 × 56 = 840,
20/15 = 20 × 56/15 × 56 = 1120/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
90/56 = 90 × 15/56 × 15 = 1350/840 - Subtract the two like fractions:
1120/840 - 1350/840 = 1120 - 1350/840 = -230/840 - After reducing the fraction, the answer is -23/84
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