Add 6/4 and 36/21, Solve 1 2/4 + 1 15/21 as a fraction

Add 6/4 and 36/21

1^st number: 1 2/4, 2^nd number: 1 15/21

6/4 + 36/21 is 45/14.

Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 4 × 21 = 84,
6/4 = 6 × 21/4 × 21 = 126/84
Likewise, for the 2nd fraction, since 21 × 4 = 84,
36/21 = 36 × 4/21 × 4 = 144/84
Add the two like fractions:
126/84 + 144/84 = 126 + 144/84 = 270/84
270/84 simplified gives 45/14
So, 6/4 + 36/21 = 45/14
In mixed form: 33/14

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