Subtract 21/16 from 30/40
1st number: 30/40, 2nd number: 1 5/16
30/40 - 21/16 is -9/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 16 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 40 × 2 = 80,
30/40 = 30 × 2/40 × 2 = 60/80 - Likewise, for the 2nd fraction, since 16 × 5 = 80,
21/16 = 21 × 5/16 × 5 = 105/80 - Subtract the two like fractions:
60/80 - 105/80 = 60 - 105/80 = -45/80 - After reducing the fraction, the answer is -9/16
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