Answer:
14411/8900
Explanation:
One way to approach this problem is to find and use the LCD. It is 8900. Then we're in the position of having to add:
56(100) + 89(99) = 14411/8900,
to find the new numerator, and then to write the final result as 14411/8900.
Or you could add 56/89 and 99/100 on a calculator and then reduce the resulting decimal fraction to lowest terms; the result will still be 14411/8900.