Add 21/6 and 45/20, Solve 3 3/6 + 2 5/20 as a fraction

Add 21/6 and 45/20

1^st number: 3 3/6, 2^nd number: 2 5/20

21/6 + 45/20 is 23/4.

Find the least common denominator or LCM of the two denominators:
LCM of 6 and 20 is 60

Next, find the equivalent fraction of both fractional numbers with denominator 60
For the 1st fraction, since 6 × 10 = 60,
21/6 = 21 × 10/6 × 10 = 210/60
Likewise, for the 2nd fraction, since 20 × 3 = 60,
45/20 = 45 × 3/20 × 3 = 135/60
Add the two like fractions:
210/60 + 135/60 = 210 + 135/60 = 345/60
345/60 simplified gives 23/4
So, 21/6 + 45/20 = 23/4
In mixed form: 53/4

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