7th grade math help me pleaseee

Answer:
Step-by-step explanation:
we will convert these all into percents since when you grade you get a percent
so 82%
1. 17/20 WHAT YOU DO IS & YOU DIVIDE 17 BY 20 you get 85%
2. 21/25 same thing we are going to DIVIDE 21 BY 25 and you get 84%
3. 0.8 since this is out of 100 you are going to move the decimal twice to the right because there are TWO ZEROS in a hundred so it would be 80% or you can multiply by 10
so the highest score would be 17/20
pls mark me brainliest