Subtract 72/81 from 45/15
1st number: 3 0/15, 2nd number: 72/81
45/15 - 72/81 is 19/9.
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,
72/81 = 72 × 5/81 × 5 = 360/405 - Subtract the two like fractions:
1215/405 - 360/405 = 1215 - 360/405 = 855/405 - After reducing the fraction, the answer is 19/9
- In mixed form: 21/9
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