Subtract 5/81 from 80/2, Solve 40 0/2

Subtract 5/81 from 80/2

1^st number: 40 0/2, 2^nd number: 5/81

80/2 - 5/81 is 3235/81.

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,
80/2 = 80 × 81/2 × 81 = 6480/162
Likewise, for the 2nd fraction, since 81 × 2 = 162,
5/81 = 5 × 2/81 × 2 = 10/162
Subtract the two like fractions:
6480/162 - 10/162 = 6480 - 10/162 = 6470/162
After reducing the fraction, the answer is 3235/81
In mixed form: 3976/81

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