Subtract 18/9 from 20/15
1st number: 1 5/15, 2nd number: 2 0/9
20/15 - 18/9 is -2/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
20/15 = 20 × 3/15 × 3 = 60/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
18/9 = 18 × 5/9 × 5 = 90/45 - Subtract the two like fractions:
60/45 - 90/45 = 60 - 90/45 = -30/45 - After reducing the fraction, the answer is -2/3
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