Add 81/36 and 70/42, Solve 2 9/36 + 1 28/42 as a fraction

Add 81/36 and 70/42

1^st number: 2 9/36, 2^nd number: 1 28/42

81/36 + 70/42 is 47/12.

Find the least common denominator or LCM of the two denominators:
LCM of 36 and 42 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 36 × 7 = 252,
81/36 = 81 × 7/36 × 7 = 567/252
Likewise, for the 2nd fraction, since 42 × 6 = 252,
70/42 = 70 × 6/42 × 6 = 420/252
Add the two like fractions:
567/252 + 420/252 = 567 + 420/252 = 987/252
987/252 simplified gives 47/12
So, 81/36 + 70/42 = 47/12
In mixed form: 311/12

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