Subtract 15/18 from 80/20
1st number: 4 0/20, 2nd number: 15/18
80/20 - 15/18 is 19/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
80/20 = 80 × 9/20 × 9 = 720/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
15/18 = 15 × 10/18 × 10 = 150/180 - Subtract the two like fractions:
720/180 - 150/180 = 720 - 150/180 = 570/180 - After reducing the fraction, the answer is 19/6
- In mixed form: 31/6
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