Subtract 15/20 from 15/45
15/45 - 15/20 is -5/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
15/45 = 15 × 4/45 × 4 = 60/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
15/20 = 15 × 9/20 × 9 = 135/180 - Subtract the two like fractions:
60/180 - 135/180 = 60 - 135/180 = -75/180 - After reducing the fraction, the answer is -5/12
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