Add 21/6 and 81/4, Solve 3 3/6 + 20 1/4 as a fraction

Add 21/6 and 81/4

1^st number: 3 3/6, 2^nd number: 20 1/4

21/6 + 81/4 is 95/4.

Find the least common denominator or LCM of the two denominators:
LCM of 6 and 4 is 12

Next, find the equivalent fraction of both fractional numbers with denominator 12
For the 1st fraction, since 6 × 2 = 12,
21/6 = 21 × 2/6 × 2 = 42/12
Likewise, for the 2nd fraction, since 4 × 3 = 12,
81/4 = 81 × 3/4 × 3 = 243/12
Add the two like fractions:
42/12 + 243/12 = 42 + 243/12 = 285/12
285/12 simplified gives 95/4
So, 21/6 + 81/4 = 95/4
In mixed form: 233/4

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