Explanation: For this problem, we say that $30 per month is the full price (or 100%). So if we get a sale on the rental plan of 35% off, then this means we pay 100% - 35% = 65%. So we are paying 65% of the total price. To get this value we can say the following:
Paid = 0.65 * $30 Paid = $19.5
So you pay $19.50 for the rental plan on sale.
Another way to work this is with proportions. Consider x to be the amount you pay.
