Add 90/36 and 56/21, Solve 2 18/36 + 2 14/21 as a fraction

Add 90/36 and 56/21

1^st number: 2 18/36, 2^nd number: 2 14/21

90/36 + 56/21 is 31/6.

Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 36 × 7 = 252,
90/36 = 90 × 7/36 × 7 = 630/252
Likewise, for the 2nd fraction, since 21 × 12 = 252,
56/21 = 56 × 12/21 × 12 = 672/252
Add the two like fractions:
630/252 + 672/252 = 630 + 672/252 = 1302/252
1302/252 simplified gives 31/6
So, 90/36 + 56/21 = 31/6
In mixed form: 51/6

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