Subtract 21/40 from 9/24
9/24 - 21/40 is -3/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 24 × 5 = 120,
9/24 = 9 × 5/24 × 5 = 45/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
21/40 = 21 × 3/40 × 3 = 63/120 - Subtract the two like fractions:
45/120 - 63/120 = 45 - 63/120 = -18/120 - After reducing the fraction, the answer is -3/20
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