5.75 is 92% of 6.25. Meaning that the answer is B. 8.0%. To figure this out you simply need to take her estimate, 5.75, and put it in fraction form, with the denominator being the actual total, 6.25. So it would look like this. 5.75/6.25= 0.92. 0.92 equals 92%. now all the heavy part is over,subtract 92 from 100 to get 8 percent as your answer.