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:

$\frac{100}{30}=\frac{x}{21}$

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:

$\begin{gathered} (21)(\frac{100}{30})=(\frac{x}{21})(21) \\ \\ \frac{2100}{30}=x \end{gathered}$

- Divide the numerator by the denominator:

$x=70$

The answer is: 70%