Solutions by everydaycalculation.com

1^{st} number: 1/42, 2^{nd} number: 3 12/24

142 + 8424 is 7421.

- Find the least common denominator or LCM of the two denominators:

LCM of 42 and 24 is**168**

Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,

142 = 1 × 442 × 4 = 4168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,

8424 = 84 × 724 × 7 = 588168 - Add the two like fractions:

4168 + 588168 = 4 + 588168 = 592168 - 592/168 simplified gives 7421
- So, 1/42 + 84/24 = 74/21

In mixed form: 31121

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