Add 84/20 and 28/84, Solve 4 4/20 + 28/84 as a fraction

Add 84/20 and 28/84

1^st number: 4 4/20, 2^nd number: 28/84

84/20 + 28/84 is 68/15.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 20 × 21 = 420,
84/20 = 84 × 21/20 × 21 = 1764/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
28/84 = 28 × 5/84 × 5 = 140/420
Add the two like fractions:
1764/420 + 140/420 = 1764 + 140/420 = 1904/420
1904/420 simplified gives 68/15
So, 84/20 + 28/84 = 68/15
In mixed form: 48/15

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