Add 70/18 and 21/54, Solve 3 16/18 + 21/54 as a fraction

Add 70/18 and 21/54

1^st number: 3 16/18, 2^nd number: 21/54

70/18 + 21/54 is 77/18.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 54 is 54

Next, find the equivalent fraction of both fractional numbers with denominator 54
For the 1st fraction, since 18 × 3 = 54,
70/18 = 70 × 3/18 × 3 = 210/54
Likewise, for the 2nd fraction, since 54 × 1 = 54,
21/54 = 21 × 1/54 × 1 = 21/54
Add the two like fractions:
210/54 + 21/54 = 210 + 21/54 = 231/54
231/54 simplified gives 77/18
So, 70/18 + 21/54 = 77/18
In mixed form: 45/18

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