Subtract 27/10 from 42/20
1st number: 2 2/20, 2nd number: 2 7/10
42/20 - 27/10 is -3/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 10 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 10 × 2 = 20,
27/10 = 27 × 2/10 × 2 = 54/20 - Subtract the two like fractions:
42/20 - 54/20 = 42 - 54/20 = -12/20 - After reducing the fraction, the answer is -3/5
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