Based on the sample results, about what percent of the population prefers reading a hard copy?

D, i am not sure if it is 100% correct, but most likely.

84%

Step-by-step explanation:

Basically, you need to think about proportions. Since the total in this scenario is 25 and 21/25 people prefer hard copies, you need to figure out how to get that fraction to a fraction over 100.

The easiest way to do this is to multiply both numbers by 4. The value of the fraction stays the same, but what you're doing is basically reverse simplifying.

Now after multiplying by 4, you get 84/100, which is 84%! :)

their is no graph showing

step-by-step explanation:

1/3 + 1/3 ≠ 2/6 because 1/3 alone = 2/6  

step by step explanation:

1/3 + 1/3 = 2/3       2/3=4/6