Add 72/20 and 7/80, Solve 3 12/20 + 7/80 as a fraction

Add 72/20 and 7/80

1^st number: 3 12/20, 2^nd number: 7/80

72/20 + 7/80 is 59/16.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 80 is 80

Next, find the equivalent fraction of both fractional numbers with denominator 80
For the 1st fraction, since 20 × 4 = 80,
72/20 = 72 × 4/20 × 4 = 288/80
Likewise, for the 2nd fraction, since 80 × 1 = 80,
7/80 = 7 × 1/80 × 1 = 7/80
Add the two like fractions:
288/80 + 7/80 = 288 + 7/80 = 295/80
295/80 simplified gives 59/16
So, 72/20 + 7/80 = 59/16
In mixed form: 311/16

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