Add 84/2 and 9/21, Solve 42 0/2 + 9/21 as a fraction

Add 84/2 and 9/21

1^st number: 42 0/2, 2^nd number: 9/21

84/2 + 9/21 is 297/7.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42

Next, find the equivalent fraction of both fractional numbers with denominator 42
For the 1st fraction, since 2 × 21 = 42,
84/2 = 84 × 21/2 × 21 = 1764/42
Likewise, for the 2nd fraction, since 21 × 2 = 42,
9/21 = 9 × 2/21 × 2 = 18/42
Add the two like fractions:
1764/42 + 18/42 = 1764 + 18/42 = 1782/42
1782/42 simplified gives 297/7
So, 84/2 + 9/21 = 297/7
In mixed form: 423/7

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