Add 40/12 and 21/36, Solve 3 4/12 + 21/36 as a fraction

Add 40/12 and 21/36

1^st number: 3 4/12, 2^nd number: 21/36

40/12 + 21/36 is 47/12.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 36 is 36

Next, find the equivalent fraction of both fractional numbers with denominator 36
For the 1st fraction, since 12 × 3 = 36,
40/12 = 40 × 3/12 × 3 = 120/36
Likewise, for the 2nd fraction, since 36 × 1 = 36,
21/36 = 21 × 1/36 × 1 = 21/36
Add the two like fractions:
120/36 + 21/36 = 120 + 21/36 = 141/36
141/36 simplified gives 47/12
So, 40/12 + 21/36 = 47/12
In mixed form: 311/12

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