hi, i need help how to set this up please...
" josephine went shopping at the local dress shop. she finds a red dress she likes for $25.00. it was tagged 20% off the original price. how much was the discount?"
ok i honestly have no idea how to set this up. please help and thank you!
" josephine went shopping at the local dress shop. she finds a red dress she likes for $25.00. it was tagged 20% off the original price. how much was the discount?"
ok i honestly have no idea how to set this up. please help and thank you!

Let's say the original price was X. What they're doing is taking 20% of the original price, then they subtract that amount from the original price to get the discounted price. So:
X  (X * .20) = $25.00. This can be rewritten as:
X  .2X = $25.00, or .8X = $25.00.
To get X, divide both sides by .8:
X = $25.00/.8 = $31.25.
You can check your answer by working backwards. What's 20% off of $31.25?
$31.25 * .2 = $6.25. Now subtract the $6.25 from $31.25: $31.25  $6.25 = $25.00.
So the original price was $31.25. The discount was $6.25.
X  (X * .20) = $25.00. This can be rewritten as:
X  .2X = $25.00, or .8X = $25.00.
To get X, divide both sides by .8:
X = $25.00/.8 = $31.25.
You can check your answer by working backwards. What's 20% off of $31.25?
$31.25 * .2 = $6.25. Now subtract the $6.25 from $31.25: $31.25  $6.25 = $25.00.
So the original price was $31.25. The discount was $6.25.

How much was the discount? 5 dollars
How much was the original price? 25 dollars
How much was the discounted price? 20 dollars
20% of 25 is 5 dollars
How much was the original price? 25 dollars
How much was the discounted price? 20 dollars
20% of 25 is 5 dollars

Answer: 20% discount
Working: 20%=20%
Working: 20%=20%

.20 x $25 = $5
$5 discount
$5 discount

^ditto