Answer:
A. $1.13
B. $1.37
Step-by-step explanation:
So the item costs $2.50 baseline but there is a 45% off sale.
Let P = the percentage off, x = the original cost, and y = the amount saved
Let's use the formula P% * x = y.
First we replace the variables with their values we know: 45% * 2.5 = y
(we remove the 0 on the end from 2.50 as it is redundant outside of money and this makes calculation a bit easier to read)
Next we need to convert 45% into a decimal, so we divide 45 by 100: 0.45 * 2.5 = y
Then multiply these values: 1.125 = y
We then round 1.125 to the nearest cent, and that finishes part A: We save $1.13
Now, we need to calculate the price we pay for the item, which is much simpler. Let p = the price we end up paying: 2.50 - 1.13 = p
Lastly, we need to subtract those two values: 1.37 = p
Therefore, we pay $1.37 for the item.
