To find the equivalent value of "8 out of 40" as "___ out of 100," we can set up a proportion:

\[
\frac{8}{40} = \frac{x}{100}
\]

Now, solve for \( x \):

1. Cross-multiply:
   \[
   8 \times 100 = 40 \times x
   \]
   \[
   800 = 40x
   \]

2. Divide both sides by 40:
   \[
   x = \frac{800}{40} = 20
   \]

So, 8 out of 40 is equivalent to 20 out of 100.

Would you like further details or have any questions?

Here are 5 related questions for practice:
1. What is 12 out of 60 equivalent to out of 100?
2. What is 15 out of 30 as a percentage?
3. Convert 25 out of 50 into an equivalent fraction out of 100.
4. What percentage is 7 out of 35?
5. If 9 out of 45 is converted to a fraction out of 100, what is the result?

**Tip:** Cross-multiplication is a quick method to solve proportion problems like this one.

Discover how to solve the proportion problem '8 out of 40 is equivalent to ___ out of 100' using cross-multiplication. Learn step-by-step how to set up the equation, solve for the unknown, and understand proportionality. Suitable for Grades 5-7.

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