Answers

Add 81/7 and 84/90

1^st number: 11 4/7, 2^nd number: 84/90

81/7 + 84/90 is 1313/105.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 7 × 90 = 630,
   81/7 = 81 × 90/7 × 90 = 7290/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   84/90 = 84 × 7/90 × 7 = 588/630
4. Add the two like fractions:
   7290/630 + 588/630 = 7290 + 588/630 = 7878/630
5. 7878/630 simplified gives 1313/105
6. So, 81/7 + 84/90 = 1313/105
   In mixed form: 1253/105

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