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Chapter 2: Problem 129

8 is \(40 \%\) of what number?

Short Answer

Expert verified
The number is 20.

Step by step solution

01

Understand the problem and express it as an equation

The problem could be express as: '8 is 40% of what number?' or '8 is 40/100 of X'. This can be expressed as an equation: \( \frac{8}{X} = \frac{40}{100} \)
02

Solve the equation by cross-multiplying

In order to solve for X, we can use cross-multiplication. This gives us the equation: \( 8*100 = 40*X \)
03

Divide by 40

To isolate X, we divide both sides of the equation by 40. This gives us X= \( \frac{8*100}{40} \)
04

Simplify the equation

By simplifying the equation from the previous step, we can find the value of X. This gives X=20.

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Most popular questions from this chapter

Determine whether each statement "makes sense" or "does not make sense" and explain your reasoning. I prefer interval notation over set-builder notation because it takes less space to write solution sets.

Will help you prepare for the material covered in the next section. Use \(A=\frac{1}{2} b h\) to find \(h\) if \(A=30\) and \(b=12\)

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