Subtract 81/16 from 20/36
1st number: 20/36, 2nd number: 5 1/16
20/36 - 81/16 is -649/144.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 16 is 144
Next, find the equivalent fraction of both fractional numbers with denominator 144 - For the 1st fraction, since 36 × 4 = 144,
20/36 = 20 × 4/36 × 4 = 80/144 - Likewise, for the 2nd fraction, since 16 × 9 = 144,
81/16 = 81 × 9/16 × 9 = 729/144 - Subtract the two like fractions:
80/144 - 729/144 = 80 - 729/144 = -649/144
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