Add 20/14 and 84/21, Solve 1 6/14 + 4 0/21 as a fraction

Add 20/14 and 84/21

1^st number: 1 6/14, 2^nd number: 4 0/21

20/14 + 84/21 is 38/7.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42

Next, find the equivalent fraction of both fractional numbers with denominator 42
For the 1st fraction, since 14 × 3 = 42,
20/14 = 20 × 3/14 × 3 = 60/42
Likewise, for the 2nd fraction, since 21 × 2 = 42,
84/21 = 84 × 2/21 × 2 = 168/42
Add the two like fractions:
60/42 + 168/42 = 60 + 168/42 = 228/42
228/42 simplified gives 38/7
So, 20/14 + 84/21 = 38/7
In mixed form: 53/7

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