Add 45/12 and 72/5, Solve 3 9/12 + 14 2/5 as a fraction

Add 45/12 and 72/5

1^st number: 3 9/12, 2^nd number: 14 2/5

45/12 + 72/5 is 363/20.

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,
72/5 = 72 × 12/5 × 12 = 864/60
Add the two like fractions:
225/60 + 864/60 = 225 + 864/60 = 1089/60
1089/60 simplified gives 363/20
So, 45/12 + 72/5 = 363/20
In mixed form: 183/20

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