Answers

Add 72/42 and 84/90

1^st number: 1 30/42, 2^nd number: 84/90

72/42 + 84/90 is 278/105.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 42 × 15 = 630,
   72/42 = 72 × 15/42 × 15 = 1080/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   84/90 = 84 × 7/90 × 7 = 588/630
4. Add the two like fractions:
   1080/630 + 588/630 = 1080 + 588/630 = 1668/630
5. 1668/630 simplified gives 278/105
6. So, 72/42 + 84/90 = 278/105
   In mixed form: 268/105

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