Subtract 15/5 from 20/18
1st number: 1 2/18, 2nd number: 3 0/5
20/18 - 15/5 is -17/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 5 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
20/18 = 20 × 5/18 × 5 = 100/90 - Likewise, for the 2nd fraction, since 5 × 18 = 90,
15/5 = 15 × 18/5 × 18 = 270/90 - Subtract the two like fractions:
100/90 - 270/90 = 100 - 270/90 = -170/90 - After reducing the fraction, the answer is -17/9
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