Subtract 3/80 from 18/5, Solve 3 3/5

Subtract 3/80 from 18/5

1^st number: 3 3/5, 2^nd number: 3/80

18/5 - 3/80 is 57/16.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 80 is 80

Next, find the equivalent fraction of both fractional numbers with denominator 80
For the 1st fraction, since 5 × 16 = 80,
18/5 = 18 × 16/5 × 16 = 288/80
Likewise, for the 2nd fraction, since 80 × 1 = 80,
3/80 = 3 × 1/80 × 1 = 3/80
Subtract the two like fractions:
288/80 - 3/80 = 288 - 3/80 = 285/80
After reducing the fraction, the answer is 57/16
In mixed form: 39/16

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