Subtract 9/5 from 45/12, Solve 3 9/12

Subtract 9/5 from 45/12

1^st number: 3 9/12, 2^nd number: 1 4/5

45/12 - 9/5 is 39/20.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 5 is 60

Next, find the equivalent fraction of both fractional numbers with denominator 60
For the 1st fraction, since 12 × 5 = 60,
45/12 = 45 × 5/12 × 5 = 225/60
Likewise, for the 2nd fraction, since 5 × 12 = 60,
9/5 = 9 × 12/5 × 12 = 108/60
Subtract the two like fractions:
225/60 - 108/60 = 225 - 108/60 = 117/60
After reducing the fraction, the answer is 39/20
In mixed form: 119/20

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