Question

Adrienne operates the milkshake machine at Burgers and Shakes. on Monday she added whipped cream to 210 shakes.This was 70% of the total milkshakes sold. how many milkshakes were sold at Burgers and Shakes on Monday? How many shakes did not have whipped cream?​

Answer 1

Total number of milkshakes sold on Monday = 300

Number of milkshakes without whipped cream = 90

Explanation:

Given:

Adrienne adds whipped cream to 210 milk shakes which is 70% of the total milk shakes sold.

To find the total milkshakes sold.

Solution:

Let the total number of milkshakes sold on Monday be =
`x`

Percentage of milkshakes with whipped cream added to them = 70%

Number of milk shakes with added whipped cream can be given as:

⇒
`70\% \textrm{ of the total number of milkshakes}`

⇒
`70\% x`

⇒
`(70)/(100)x` [Representing percent in fraction form]

⇒
`0.7x` [evaluating in decimals]

We know that the number of milkshakes with whipped cream added to them = 210.

So, we have:

`0.7x=210`

Solving for
`x`

Dividing both sides by 0.7

`(0.7x)/(0.7)=(210)/(0.7)`

∴
`x=300`

Thus, total number of milkshakes sold on Monday = 300

Number of milkshakes without whipped cream =
`300-210`= 90