Add 84/18 and 3/42, Solve 4 12/18 + 3/42 as a fraction

Add 84/18 and 3/42

1^st number: 4 12/18, 2^nd number: 3/42

84/18 + 3/42 is 199/42.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 18 × 7 = 126,
84/18 = 84 × 7/18 × 7 = 588/126
Likewise, for the 2nd fraction, since 42 × 3 = 126,
3/42 = 3 × 3/42 × 3 = 9/126
Add the two like fractions:
588/126 + 9/126 = 588 + 9/126 = 597/126
597/126 simplified gives 199/42
So, 84/18 + 3/42 = 199/42
In mixed form: 431/42

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