Exercise 8 Page 213

We have two different coupons and want to find how large the total bill must be for the discount to be the same. We know that one of the coupons gives us $ 5 off as long as the meal cost at least twice that. Discount Coupon2: $ 5We now need to know how large the bill must be when Coupon 1 gives the same discount, which is 20 % off the bill. Let's recall the percent proportion. a/b=p/100 Here, the discount in dollars is the part a and p is the percent, which here is 20. Let's substitute these values into the formula and solve for b, which is the size of the bill.

Both coupons will save us the same amount of money when our total bill at the restaurant is $ 25.