Add 45/12 and 4/80, Solve 3 9/12 + 4/80 as a fraction

Add 45/12 and 4/80

1^st number: 3 9/12, 2^nd number: 4/80

45/12 + 4/80 is 19/5.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 80 is 240

Next, find the equivalent fraction of both fractional numbers with denominator 240
For the 1st fraction, since 12 × 20 = 240,
45/12 = 45 × 20/12 × 20 = 900/240
Likewise, for the 2nd fraction, since 80 × 3 = 240,
4/80 = 4 × 3/80 × 3 = 12/240
Add the two like fractions:
900/240 + 12/240 = 900 + 12/240 = 912/240
912/240 simplified gives 19/5
So, 45/12 + 4/80 = 19/5
In mixed form: 34/5

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