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
[tex]\begin{gathered} 0.45x=18 \\ \\ \text{ Divide both-side of the equation by }x. \\ \\ \frac{0.45x}{0.45}=\frac{18}{0.45} \\ \\ x=40 \end{gathered}[/tex]ANSWER
a) 40
b)
