The highest possible score on an entrance exam is 800 points. which scores are between 80% and 90% of the highest possible score? (select all that apply)

A.710 points
B.810 points
C.585 points
D.645 points

A. 710 points and D. 645 points

Step-by-step explanation:

Its kind of like the butterfly method in middle school. It says the highest you can get on the exams is 800 points. So, it would be 710/800 = ?/100. But now you have to find the numerator that goes over 100. Now you cross multiply 710 and 100 and divide it by 800. The ? is now 88.75 or 89% (rounded to nearest hundredth). Now you repeat the method again but this time replace 710 with 645. The equation is now 645/800 = ?/100. You cross multiply 645 and 100 and divide it by 800. Now the ? is now 80.62 or 81% ( rounded to the nearest hundredth).