At a reastaurant, Toby knew he would tip his server 20% of whatever the cost(c) of the final bill was. He knew he could use the strategy "c + 0.2c" to calculate his final cost after paying the 20% tip. Which other process could Toby use to calculate his cost after tip?

Answer 1

Toby could use the process of multiplying the cost by 1.2 to calculate his cost after tip. This is because adding 0.2c to c is the same as multiplying c by 1.2. Therefore, Toby could use either "c + 0.2c" or "1.2c" to calculate his cost after the 20% tip.