The number of students in a chess club decreased from 22 to 12. What is the percent decrease? Round your answer to the nearest percent.

45.5%

Step-by-step explanation:

Rate of Change = Change / Original

In this case it would be 10/22

To convert fractions into percent we use proportions

In this case it would be 10/22 = x/100

Then we solve

It would be 45.454545...

The nearest percent would be 45.5%

proportions are fractions that equal to each other. so if two fractions are the same, they are proportional.

let's check the answers to see if they are proportional.

question a is not proportional because you can't turn 1.5/3 to 3/9. if you try to multiply 1.5/3 by 2 or 3, you wont get 3/9. it's impossible to make the fractions the same.

question b is not proportional because you can't turn 22/33 to 4/6. 33 can't go into 6.

question c is proportional because when you multiply 2 and 3 by 71, you would get 142/213, and those fractions equal to each other

question d is proportional because when you divide 14 and 7 by 2, you would end up with 7/3.5, and those fractions equal to each other.

the answer on ed. is:

c. "the graph of f(x) has exactly two x-intercepts."

hope i could someone! : )