Question

from $17.99 to $19.99 what was the percent of increase ?

Answer 1

11%

Answer 2

may i know how you got that pls?

Answer 3

???????????????????????????????????

Answer 4

Yes, (1-19.99/17.99)

Answer 5

?

Answer 6

how did you get the 1?

Answer 7

11% is right, but that's not the formula

Answer 8

% increase = (new price - old price) / (old price)

Answer 9

so which one is right?

Answer 10

(19.99 - 17.99) / 17.99 = 11.12% or rounded to 11%

Answer 11

ok

Answer 12

@gezimbasha had the right answer, but (1 - 19.99/17.99) = (-18.99/17.99)

I think it was just a typo or something.

Answer 13

ok thanks

Answer 14

Yes, but my formula was this one...\[\frac{19.99}{17.99}-1=\frac{19.99-17.99}{17.99}\]I just swapped the 1 which is still correct but not mathematically legit.. it will just give you -11%.

Answer 15

ok

Answer 16

so would both ways work?

Answer 17

yeah, its just that I usually just do the first 19.99/17.99 on a calc and subtract from 1, easier for me.

Answer 18

Oh :) didn't realize what you were doing... that's fine too :)

Answer 19

as long as you understand how to flip the neg, it's a good calculator short-cut :)

@Bacon, if you forget, just try to reason through... % increase is "how much did I increase divided by how much did I start with?"

Answer 20

thanks

Answer 21

So, if you start with 10 and increase to 15, you increased by 5. 5 over the original 10 means a 50% increase. and so on.

Answer 22

i have another question

Answer 23

i'll open it in something else

Answer 24

good choice :)