Add 1/42 and 42/12, Solve 1/42 + 3 6/12 as a fraction

Add 1/42 and 42/12

1^st number: 1/42, 2^nd number: 3 6/12

1/42 + 42/12 is 74/21.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 12 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 42 × 2 = 84,
1/42 = 1 × 2/42 × 2 = 2/84
Likewise, for the 2nd fraction, since 12 × 7 = 84,
42/12 = 42 × 7/12 × 7 = 294/84
Add the two like fractions:
2/84 + 294/84 = 2 + 294/84 = 296/84
296/84 simplified gives 74/21
So, 1/42 + 42/12 = 74/21
In mixed form: 311/21

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