Add 18/63 and 40/12, Solve 18/63 + 3 4/12 as a fraction

Add 18/63 and 40/12

1^st number: 18/63, 2^nd number: 3 4/12

18/63 + 40/12 is 76/21.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 12 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 63 × 4 = 252,
18/63 = 18 × 4/63 × 4 = 72/252
Likewise, for the 2nd fraction, since 12 × 21 = 252,
40/12 = 40 × 21/12 × 21 = 840/252
Add the two like fractions:
72/252 + 840/252 = 72 + 840/252 = 912/252
912/252 simplified gives 76/21
So, 18/63 + 40/12 = 76/21
In mixed form: 313/21

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