Question

25% of what number w is 9?=25100

Answer 1

25 % of 36 is 9

Step-by-step explanation

Step 1

the easy way to find the percentage of any number is:

`\begin{gathered} y\text{ \% of x } \\ total\text{ =x*}(y)/(100) \end{gathered}`

so

A) let

25% of what number w is 9?

let

`\begin{gathered} nubmer(x)\text{ = W} \\ percentage\text{ \lparen y\rparen=25 \%} \\ total\text{ =}9 \end{gathered}`

now, replace and solve for w:

`\begin{gathered} y\text{ \% of x } \\ total\text{ =x*}(y)/(100) \\ 9=W*(25)/(100) \\ 9=W*0.25 \\ divide\text{ both sides by 0.25} \\ (9)/(0.25)=(W*0.25)/(0.25) \\ 36=W \end{gathered}`

therefore ,

25 % of 36 is 9