Question

as a club fundraiser, a group of students washed 40 cars one weekend,they washed 70 cars. what was the percent increase in the numbers of cars washed

Answer 1

Percent increase in the numbers of cars washed is 75%

Explanation:

Given:

Number of cars washed in First weekend by the students =40 cars

Number of cars washed in second weekend by the students= 70 cars

To Find:

Percentage of increase in the number of car washed=?

Solution:

we know that

Percentage Increase=Final Value−Starting Value|Starting Value x 100

According to our question

`\text{Percentage Increase in cars }= \frac{\text{cars washed in second week} -\text{cars washed in first week}}{\text{cars washed in the first weekend}}* 100`

Substituting the values,

percentage of increase in the cars =
`(70-40)/(40)*100`

percentage of increase in the cars =
`(30)/(40)*100`

percentage of increase in the cars =
`0.75*100`

percentage of increase in the cars =75

Answer 2

75%

Explanation:

• To know the answer, you should take into account that, 70 equals 1,75 times 40.

• This is because
  `(70)/(40)=1,75` .

• Then, if 70 equals 1,75 times 40, it is 0,75 = 75% greater than 40.