Subtract 18/20 from 42/40
1st number: 1 2/40, 2nd number: 18/20
42/40 - 18/20 is 3/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
42/40 = 42 × 1/40 × 1 = 42/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
18/20 = 18 × 2/20 × 2 = 36/40 - Subtract the two like fractions:
42/40 - 36/40 = 42 - 36/40 = 6/40 - After reducing the fraction, the answer is 3/20
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