Subtract 80/81 from 45/15
1st number: 3 0/15, 2nd number: 80/81
45/15 - 80/81 is 163/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 15 × 27 = 405,
45/15 = 45 × 27/15 × 27 = 1215/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
80/81 = 80 × 5/81 × 5 = 400/405 - Subtract the two like fractions:
1215/405 - 400/405 = 1215 - 400/405 = 815/405 - After reducing the fraction, the answer is 163/81
- In mixed form: 21/81
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