Add 12/7 and 54/80, Solve 1 5/7 + 54/80 as a fraction

Add 12/7 and 54/80

1^st number: 1 5/7, 2^nd number: 54/80

12/7 + 54/80 is 669/280.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 80 is 560

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 7 × 80 = 560,
12/7 = 12 × 80/7 × 80 = 960/560
Likewise, for the 2nd fraction, since 80 × 7 = 560,
54/80 = 54 × 7/80 × 7 = 378/560
Add the two like fractions:
960/560 + 378/560 = 960 + 378/560 = 1338/560
1338/560 simplified gives 669/280
So, 12/7 + 54/80 = 669/280
In mixed form: 2109/280

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