Add 80/12 and 90/84, Solve 6 8/12 + 1 6/84 as a fraction

Add 80/12 and 90/84

1^st number: 6 8/12, 2^nd number: 1 6/84

80/12 + 90/84 is 325/42.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 84 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 12 × 7 = 84,
80/12 = 80 × 7/12 × 7 = 560/84
Likewise, for the 2nd fraction, since 84 × 1 = 84,
90/84 = 90 × 1/84 × 1 = 90/84
Add the two like fractions:
560/84 + 90/84 = 560 + 90/84 = 650/84
650/84 simplified gives 325/42
So, 80/12 + 90/84 = 325/42
In mixed form: 731/42

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