Question

percent increase or decrease : before 40 after 65 what are the steps to do this i forgot???

Answer 1

amount of change/ original

Answer 2

so it would be 65-40/40

Answer 3

so its 40/65??

Answer 4

15/40

Answer 5

simplify that..3/8

Answer 6

use a calculator...

Answer 7

3/8=0.375
move decimal 2 steps to right
37.5% increse

Answer 8

8/13????

Answer 9

nooo

Answer 10

lets take this step by step k?

Answer 11

ok

Answer 12

so the formula is
change in amount/ orginal

Answer 13

so the change in amount is the change between 65 and 40
so 65-40/original

Answer 14

and the original is 40, because u said before.

Answer 15

so now the equation is 65-40/40

Answer 16

so if u simplify that... it is 15/40

Answer 17

and if i simplify that to work with better, it becomes 3/8

Answer 18

then i use the calculator asking what 3/8 is..

Answer 19

it says 3/8=0.375

Answer 20

and since u are looking for percent i move the decimal 2 steps to the right.

Answer 21

so not 3/8= 37.5%

Answer 22

and if u are counting from 40 to 65, u are INCREASING your count...

Answer 23

therefore it is a 37.5% increase

Answer 24

get it?

Answer 25

im stuck at where i subtract then what do i do?

Answer 26

Percentage Increase or Decrease
\[=\frac{amount.of.change}{original.price} \times100\]\[=\frac{NP-OP}{OP} \times 100\]

where NP is your new price and OP is the old price

Answer 27

so in your question what was the old price and what was the new price?

Answer 28

40 old price new price 65

Answer 29

okay good so OP=40 and NP=65. try and put these values into the equation i gave above and what answer do you get?

Answer 30

so i subtract 65 -40 and i get 25 then what do i do multiply with 100?

Answer 31

well let's multiply by 100 last because all that does is change our answer to percentage. so you have 25 now you need to divide by the original price

Answer 32

0.625 i got

Answer 33

good now the last step is to times by 100

Answer 34

62.5

Answer 35

perfect so your answer is 62.5%

Answer 36

so how do i know if its increasing or decreasing?

Answer 37

if the percentage is positive it's increasing if it's negative it's decreasing

Answer 38

thanks!!!!!!!!!! ALOT!

Answer 39

no worries (: