Okay, the first step is to find what number is added up to 7 for instance, to make 16 and so on. To find that you ask yourself what number plus 7 equals 16. The answer to that would be 9.
Lets add up the numbers,
7 + 9 = 16
16 + 9 = 25
25 + 9 = 34
34 + 9 = 43
43 + 9 = 52
52 + 9 = 61
61 + 9 = 70
70 + 9 = 79
79 + 9 = 88
When you're constantly counting how much numbers you've went through, then you'll find that you have found the 9th number of your question.
You need to cross multiply 37/45+x/100 which equals 17%
Step-by-step explanation:
The first part represents the 37 dollars out of the original 45 and the second part represents x= the unknown percent out of 100 percent. This would be 17%
Since we know 85% of the students participated last year we can assume the same amount will participate this year so to find the answer you simply do the total number of students (320) multiplied by 85% or .85 to get the best guess of how many students will participate this year.
