Question

20% of what is 9? Jonas answered this question as shown.

Answer 1

Answer: 20% of 450 is 9.

Answer 2

Do you see how to get 450?

Answer 3

wait, that's too big, it should just be 45

Answer 4

guess I read it too quickly

Answer 5

20% of what is 9

0.2x = 9

x = 9/0.2

x = 45

So 20% of 45 is 9

Answer 6

Jonas answered this question as shown. Explain his error and provide the correct solution.

Answer 7

to evaluate 9/0.2 you would use long division similar to what you see in the attachment

Answer 8

his error is that he said that 20% = 0.02

when it should be 20% = 0.2

Answer 9

so is that the answer

Answer 10

pretty much, he mixed up 20% and 2%

Answer 11

when he converted to decimal form

Answer 12

ok thanks

Answer 13

IF he wanted 2% of some number = 9, then the answer would have been 450