Subtract 21/16 from 5/20
1st number: 5/20, 2nd number: 1 5/16
5/20 - 21/16 is -17/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 16 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
5/20 = 5 × 4/20 × 4 = 20/80 - Likewise, for the 2nd fraction, since 16 × 5 = 80,
21/16 = 21 × 5/16 × 5 = 105/80 - Subtract the two like fractions:
20/80 - 105/80 = 20 - 105/80 = -85/80 - After reducing the fraction, the answer is -17/16
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