Add 5/21 and 84/24, Solve 5/21 + 3 12/24 as a fraction

Add 5/21 and 84/24

1^st number: 5/21, 2^nd number: 3 12/24

5/21 + 84/24 is 157/42.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 24 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 21 × 8 = 168,
5/21 = 5 × 8/21 × 8 = 40/168
Likewise, for the 2nd fraction, since 24 × 7 = 168,
84/24 = 84 × 7/24 × 7 = 588/168
Add the two like fractions:
40/168 + 588/168 = 40 + 588/168 = 628/168
628/168 simplified gives 157/42
So, 5/21 + 84/24 = 157/42
In mixed form: 331/42

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