Subtract 18/24 from 7/20
7/20 - 18/24 is -2/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 20 × 6 = 120,
7/20 = 7 × 6/20 × 6 = 42/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
18/24 = 18 × 5/24 × 5 = 90/120 - Subtract the two like fractions:
42/120 - 90/120 = 42 - 90/120 = -48/120 - After reducing the fraction, the answer is -2/5
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