Suppose you have $150 to buy birthday gifts for two of your friends. If you spend $83.65 on the first gift, how much money do you have left for the second gift?
Since you have $150 in total and you already spent $83.65, we need to subtract to figure out how much money we have left. So 150 - 83.65 is equal to 66.35. This means that you can use $66.35 on the second gift.
