Subtract 21/24 from 2/5
2/5 - 21/24 is -19/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 5 × 24 = 120,
2/5 = 2 × 24/5 × 24 = 48/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
21/24 = 21 × 5/24 × 5 = 105/120 - Subtract the two like fractions:
48/120 - 105/120 = 48 - 105/120 = -57/120 - After reducing the fraction, the answer is -19/40
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