Add 90/12 and 84/42, Solve 7 6/12 + 2 0/42 as a fraction

Add 90/12 and 84/42

1^st number: 7 6/12, 2^nd number: 2 0/42

90/12 + 84/42 is 19/2.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 42 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 12 × 7 = 84,
90/12 = 90 × 7/12 × 7 = 630/84
Likewise, for the 2nd fraction, since 42 × 2 = 84,
84/42 = 84 × 2/42 × 2 = 168/84
Add the two like fractions:
630/84 + 168/84 = 630 + 168/84 = 798/84
798/84 simplified gives 19/2
So, 90/12 + 84/42 = 19/2
In mixed form: 91/2

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