Question

the price of a radio changes from $40.00 to $44.00.

A. 10% decrease
B.10% increase
C.36.4% decrease
D. 40% increase

Answer 1

Can you tell me if it was an increase or a decrease?

Answer 2

increase

Answer 3

alright so you know its either b or d

Answer 4

so do you know how to calculate the percent increase?

Answer 5

no

Answer 6

well.....we are measuring the change in something right?

Answer 7

right

Answer 8

so when we are measuring the change in something that means we usually will subtract two things. What do you think we will subtract?

Answer 9

44.00-40.00 right
??

Answer 10

yes so the new price minus the initial price.

Answer 11

Now its also called the percentage change in something

Answer 12

to change something to a percent we divide by something and multiply by 100

Answer 13

what do you think we should divide by?

Answer 14

i got 4 when i subtracted

Answer 15

4

Answer 16

you should have gotten 4 when you subtracted but now we have to convert that to a percent

Answer 17

so what do you think we should divide by?

Answer 18

@katalina13

Answer 19

100

Answer 20

not quite

Answer 21

we divide by the initial price

Answer 22

40

Answer 23

im sorry im not good at this

Answer 24

right then we multiply by 100

Answer 25

don't worry I'm here to help you not judge you :)

Answer 26

i got 1,100

Answer 27

not quite remember its this
\[\frac{ (44-40 }{ 40 }*100\]

Answer 28

opps forgot my close bracket on top :P

Answer 29

i got what i did wrong now i divide by 44

Answer 30

1,000

Answer 31

ummm definitely not 1000

Answer 32

what is
\[\frac{ 4 }{ 40 }\]
?

Answer 33

10

Answer 34

not quite its
\[\frac{ 1 }{ 10 }\]

Answer 35

or 0.1

Answer 36

oh ok

Answer 37

if it were
\[\frac{ 40 }{ 4 }\]
then it would be 10

Answer 38

so now that we know its 0.1 what is 0.1*100?

Answer 39

10

Answer 40

or is my calculator messed up

Answer 41

so what is the answer?

Answer 42

b

Answer 43

yup :)

Answer 44

thanks so much for your help

Answer 45

not a problem don't forget to close the question.

Answer 46

ok