Subtract 42/15 from 25/20
1st number: 1 5/20, 2nd number: 2 12/15
25/20 - 42/15 is -31/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
25/20 = 25 × 3/20 × 3 = 75/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
42/15 = 42 × 4/15 × 4 = 168/60 - Subtract the two like fractions:
75/60 - 168/60 = 75 - 168/60 = -93/60 - After reducing the fraction, the answer is -31/20
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