Subtract 15/90 from 80/30
1st number: 2 20/30, 2nd number: 15/90
80/30 - 15/90 is 5/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
80/30 = 80 × 3/30 × 3 = 240/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
15/90 = 15 × 1/90 × 1 = 15/90 - Subtract the two like fractions:
240/90 - 15/90 = 240 - 15/90 = 225/90 - After reducing the fraction, the answer is 5/2
- In mixed form: 21/2
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