Add 70/42 and 42/12, Solve 1 28/42 + 3 6/12 as a fraction

Add 70/42 and 42/12

1^st number: 1 28/42, 2^nd number: 3 6/12

70/42 + 42/12 is 31/6.

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,
70/42 = 70 × 2/42 × 2 = 140/84
Likewise, for the 2nd fraction, since 12 × 7 = 84,
42/12 = 42 × 7/12 × 7 = 294/84
Add the two like fractions:
140/84 + 294/84 = 140 + 294/84 = 434/84
434/84 simplified gives 31/6
So, 70/42 + 42/12 = 31/6
In mixed form: 51/6

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