Question

1. 21 is what % of 30?2. what is 25% of 160?Answer #1

Answer 1

1. Since you need to find whar percent is 21 of 30, you can identify that the 100% is 30.

Let be "x" the percent asked in the exercise.

Using the information provided in the exercise, you can set up the following proportion:

`(100)/(30)=(x)/(21)`

Now you must solve for the variable "x" in order to find its value:

- You can apply the Multiplication property of equality by multiplyin both sides of the equation by 21. Then:

`\begin{gathered} (21)((100)/(30))=((x)/(21))(21) \\ \\ (2100)/(30)=x \end{gathered}`

- Divide the numerator by the denominator:

`x=70`

The answer is: 70%