Subtract 72/81 from 54/15
1st number: 3 9/15, 2nd number: 72/81
54/15 - 72/81 is 122/45.
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,
54/15 = 54 × 27/15 × 27 = 1458/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
72/81 = 72 × 5/81 × 5 = 360/405 - Subtract the two like fractions:
1458/405 - 360/405 = 1458 - 360/405 = 1098/405 - After reducing the fraction, the answer is 122/45
- In mixed form: 232/45
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