Subtract 81/16 from 20/15
1st number: 1 5/15, 2nd number: 5 1/16
20/15 - 81/16 is -179/48.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 16 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 15 × 16 = 240,
20/15 = 20 × 16/15 × 16 = 320/240 - Likewise, for the 2nd fraction, since 16 × 15 = 240,
81/16 = 81 × 15/16 × 15 = 1215/240 - Subtract the two like fractions:
320/240 - 1215/240 = 320 - 1215/240 = -895/240 - After reducing the fraction, the answer is -179/48
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