Answer:
original cost - (percentage off)(original cost) = sale cost
x - 0.35x = 0.65x = sale cost Remember that x = 1x.
x - 0.35x = 1x - 0.35x = 0.65x
Step-by-step explanation:
et me give you another problem and see if you can figure it out. A shirt is x dollars and it's on sale for 20% off.
Let's think about how you would figure this out in the store and turn it into an equation.
You take the original amount, multiply it by 20%, and subtract it from the original amount.
Remember that to turn a percent into a decimal, we move the decimal 2 places to the left,
So, we have x - .20x = the new price.
Now, remember that the old price is 100%, right? What percent is the new price if we took 20% off? 80%, right?
So, we can either subtract x - .20x to get .80x, or we can take the 20% from the 100% to get the 80%, or .80x.
