Subtract 15/4 from 45/20
1st number: 2 5/20, 2nd number: 3 3/4
45/20 - 15/4 is -3/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 4 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
45/20 = 45 × 1/20 × 1 = 45/20 - Likewise, for the 2nd fraction, since 4 × 5 = 20,
15/4 = 15 × 5/4 × 5 = 75/20 - Subtract the two like fractions:
45/20 - 75/20 = 45 - 75/20 = -30/20 - After reducing the fraction, the answer is -3/2
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