Subtract 18/5 from 42/20
1st number: 2 2/20, 2nd number: 3 3/5
42/20 - 18/5 is -3/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
42/20 = 42 × 1/20 × 1 = 42/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
18/5 = 18 × 4/5 × 4 = 72/20 - Subtract the two like fractions:
42/20 - 72/20 = 42 - 72/20 = -30/20 - After reducing the fraction, the answer is -3/2
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