Add 90/36 and 24/21, Solve 2 18/36 + 1 3/21 as a fraction

Add 90/36 and 24/21

1^st number: 2 18/36, 2^nd number: 1 3/21

90/36 + 24/21 is 51/14.

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,
24/21 = 24 × 12/21 × 12 = 288/252
Add the two like fractions:
630/252 + 288/252 = 630 + 288/252 = 918/252
918/252 simplified gives 51/14
So, 90/36 + 24/21 = 51/14
In mixed form: 39/14

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