To find 80% of 42, multiply 42 by 80%, which is 0.80 in decimal form.

\[
42 \times 0.80 = 33.6
\]

So, 80% of 42 is **33.6**.

Would you like further details or have any questions? Here are 5 related questions to expand your understanding:

1. What is 50% of 42?
2. How do you calculate 25% of 84?
3. What is 120% of 50?
4. If you know 60% of a number is 30, what is the original number?
5. How do you find the percentage of one number in relation to another?

**Tip:** To convert a percentage to a decimal, divide by 100 (e.g., 80% = 0.80).

Learn how to find 80% of 42 using simple arithmetic. Multiply 42 by 0.80 to get the answer: 33.6. This problem helps build foundational skills in percentages and basic math, perfect for students in Grades 5-7.

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