Question

IIInitialnowledgeAnswer the following questions.(a) 45% of what number is 18?0%(b) 15% of 80 is what?ПХ$?

Answer 1

STEP - BY - STEP EXPLANATION

What to find?

• 45% of what number is 18?

,

• 15% of 80 is what?

To solve, we will follow the steps below:

Step 1

Let x, y represent the number respectively.

Step 2

Set up an equation.

Step 3

Solve for x and y.

That is;

a) Let x be the number.

45% of x = 18

`\begin{gathered} 0.45x=18 \\ \\ \text{ Divide both-side of the equation by }x. \\ \\ (0.45x)/(0.45)=(18)/(0.45) \\ \\ x=40 \end{gathered}`

ANSWER

a) 40

b)