Answers

Add 9/84 and 90/80

1^st number: 9/84, 2^nd number: 1 10/80

9/84 + 90/80 is 69/56.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 80 is 1680
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1680
2. For the 1st fraction, since 84 × 20 = 1680,
   9/84 = 9 × 20/84 × 20 = 180/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   90/80 = 90 × 21/80 × 21 = 1890/1680
4. Add the two like fractions:
   180/1680 + 1890/1680 = 180 + 1890/1680 = 2070/1680
5. 2070/1680 simplified gives 69/56
6. So, 9/84 + 90/80 = 69/56
   In mixed form: 113/56

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