Basic conversion: decimal to percent: Express 0.02 as a percentage.

Introduction / Context:
This is a fundamental conversion: turning a decimal into a percentage. It appears in many entry-level quantitative aptitude tests to ensure comfort with shifting between decimal and percentage forms.

Given Data / Assumptions:
The decimal given is 0.02.

Concept / Approach:
To convert a decimal to a percentage, multiply by 100 and append the percent sign. So 0.02 * 100% equals 2%. The mental shortcut is moving the decimal point two places to the right and adding %.

Step-by-Step Solution:

Verification / Alternative check:
Reverse conversion: 2% = 2/100 = 0.02. This confirms consistency.

Why Other Options Are Wrong:
20% would be 0.2; 0.02% equals 0.0002; 0.2% is 0.002; 200% equals 2. All are incorrect conversions of 0.02.

Common Pitfalls:
Forgetting to multiply by 100 or accidentally multiplying by 10 only. Keep the “two decimal places right” rule in mind for decimals to percent.

Final Answer:
2%