Make a proportion to find Mr. Yoshi's percentage:
60/75 = x/100
Cross Products:
6000 = 75x
x = 80
So 60/75 = 80/100 which is 80%
Now for the student teacher:
The student teacher graded 75-60 = 15 papers.
Make a proportion:
15/75 = x/100
Cross products:
75x = 1500
x = 20
So 15/75 = 20/100 which is 20%
So Mr. Yoshi: 80%
Student Teacher: 20%
You can check by adding the two scores together and seeing if the sum is 100%:
80% + 20% = 100%
It is, so the answer is correct.
