Subtract 54/81 from 9/5, Solve 1 4/5

Subtract 54/81 from 9/5

1^st number: 1 4/5, 2^nd number: 54/81

9/5 - 54/81 is 17/15.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 81 is 405

Next, find the equivalent fraction of both fractional numbers with denominator 405
For the 1st fraction, since 5 × 81 = 405,
9/5 = 9 × 81/5 × 81 = 729/405
Likewise, for the 2nd fraction, since 81 × 5 = 405,
54/81 = 54 × 5/81 × 5 = 270/405
Subtract the two like fractions:
729/405 - 270/405 = 729 - 270/405 = 459/405
After reducing the fraction, the answer is 17/15
In mixed form: 12/15

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