The Happy Hamburger served 100 customers yesterday. 3/10 of the customers ordered breakfast 2/5 of the remaining customers ordered take-out. The rest of the customers ordered dessert. How many customers ordered dessert?
well 30 customers ordered breakfast
and 40 customers ordered take-out
so 30 left ordered desert
hope this helps
30 ordered breakfast
"REMAINING customers"
100 - 30 = 70
70 * .4 = 28 ordered take out
100 - 28 - 30 = ? dessert
To find out how many customers ordered dessert, we need to start by finding out how many customers ordered breakfast and take-out.
Step 1: Calculate the number of customers who ordered breakfast.
The problem tells us that 3/10 of the customers ordered breakfast. So, we can find the number of customers who ordered breakfast by multiplying the total number of customers by 3/10:
Number of customers who ordered breakfast = 100 * (3/10) = 30
Step 2: Calculate the number of remaining customers who did not order breakfast.
To find the remaining customers, we subtract the number of customers who ordered breakfast from the total number of customers:
Remaining customers = Total customers - Customers who ordered breakfast
Remaining customers = 100 - 30 = 70
Step 3: Calculate the number of customers who ordered take-out.
According to the problem, 2/5 of the remaining customers ordered take-out. To find the number of customers who ordered take-out, we multiply the remaining customers by 2/5:
Number of customers who ordered take-out = Remaining customers * (2/5) = 70 * (2/5) = 28
Step 4: Calculate the number of customers who ordered dessert.
The remaining customers who didn't order breakfast or take-out are the ones who ordered dessert:
Number of customers who ordered dessert = Remaining customers - Customers who ordered take-out
Number of customers who ordered dessert = 70 - 28 = 42
Therefore, 42 customers ordered dessert.