Question

See picture below. It does not make sense how they are subtracting x from 0.7x and getting 0.3x... how can they reduce it by 0.4??

Answer 1

If its 70% off then you are only paying 30% of the original cost. So let x = original cost, .3x = 180. Solve for x.

Answer 2

wht they are doing is 1x - 0.7x = 0.3x

Answer 3

So my actual problem uses 75% off with the new cost of $130. So would that then be .25x-.75x=130? then solve for x?

Answer 4

If an item is discounted 75% , how much of the original cost are you paying?

For example, suppose you uby a pair of shoes costing $100. When you get to the check out, they tell you the great news, you will receive 75% off!!! How much are your shoes going to cost?

Answer 5

I'm still not getting it... Because if I take 1x-0.75x=0.25x

Answer 6

75% of 100 = 25, so you only pay $25 - or 25% of the original cost.

If there was no discount you would pay 100% of the original cost
. (1x = new amount)
If they discount the item 25%, then you pay 75% of the original cost.
(0.75x = new amount)
If they discount 50% you pay 50% of the original cost.
(0.5x = new amount)
If they discount 70% you pay 30% of the original cost.
(0.3x = new amount)
If they discount 75% you pay 25% of the original cost.
(0.25x = new amount)
So 1x - 0.75x is saying "original cost - 75% of the original cost"

Answer 7

So then \[1x-0.75x=0.25x\] then \[130\div0.25=520\] correct?

Answer 8

Yep!

Answer 9

Thanks

Answer 10

Cheers!