To find the unknown value where 18% of it equals 72, you can set up an equation and solve for the unknown:

\[
0.18 \times X = 72
\]

Now, solve for \(X\) by dividing both sides by 0.18:

\[
X = \frac{72}{0.18} = 400
\]

So, the unknown value is **400**.

Would you like more details or have any questions? Here are some related questions:

1. What is 25% of 400?
2. How do you calculate percentages of a number?
3. If 72 is 18% of a number, what is 100% of that number?
4. What is the percentage increase from 72 to 400?
5. How do you reverse a percentage calculation?

**Tip:** To find a percentage of a number, multiply the number by the percentage (expressed as a decimal).

Learn how to solve the problem where 18% of an unknown value equals 72. This problem involves percentage calculations and solving equations. Suitable for students in Grades 5-7.

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