Answers

Add 84/40 and 28/42

1^st number: 2 4/40, 2^nd number: 28/42

84/40 + 28/42 is 83/30.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 42 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 40 × 21 = 840,
   84/40 = 84 × 21/40 × 21 = 1764/840
3. Likewise, for the 2nd fraction, since 42 × 20 = 840,
   28/42 = 28 × 20/42 × 20 = 560/840
4. Add the two like fractions:
   1764/840 + 560/840 = 1764 + 560/840 = 2324/840
5. 2324/840 simplified gives 83/30
6. So, 84/40 + 28/42 = 83/30
   In mixed form: 223/30

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