Subtract 48/81 from 5/2, Solve 2 1/2

Subtract 48/81 from 5/2

1^st number: 2 1/2, 2^nd number: 48/81

5/2 - 48/81 is 103/54.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 81 is 162

Next, find the equivalent fraction of both fractional numbers with denominator 162
For the 1st fraction, since 2 × 81 = 162,
5/2 = 5 × 81/2 × 81 = 405/162
Likewise, for the 2nd fraction, since 81 × 2 = 162,
48/81 = 48 × 2/81 × 2 = 96/162
Subtract the two like fractions:
405/162 - 96/162 = 405 - 96/162 = 309/162
After reducing the fraction, the answer is 103/54
In mixed form: 149/54

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