Sharon wants to buy a bike helmet that costs $21. She already has $9 saved. She plans to sell lemonade to earn enough money to buy the bike helmet. For each cup of lemonade she sells, she makes a profit of $0.20. Explain how to determine how many cups of lemonade she must sell to make enough money to buy the bike helmet.
21 - 9 = 12
12/0.2 = ?
To determine how many cups of lemonade Sharon must sell to make enough money to buy the bike helmet, we can follow these steps:
1. Calculate the remaining amount of money Sharon needs to buy the bike helmet. The cost of the bike helmet is $21, and she already has $9 saved. So, the remaining amount needed is $21 - $9 = $12.
2. Determine the profit Sharon makes per cup of lemonade sold. It's given that for each cup of lemonade she sells, she makes a profit of $0.20.
3. Divide the remaining amount needed by the profit per cup. In this case, $12 divided by $0.20 equals 60.
Therefore, Sharon needs to sell at least 60 cups of lemonade to make enough money ($12) to buy the bike helmet.