Subtract 20/8 from 15/18
1st number: 15/18, 2nd number: 2 4/8
15/18 - 20/8 is -5/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
15/18 = 15 × 4/18 × 4 = 60/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
20/8 = 20 × 9/8 × 9 = 180/72 - Subtract the two like fractions:
60/72 - 180/72 = 60 - 180/72 = -120/72 - After reducing the fraction, the answer is -5/3
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