Express the fraction 3/5 as a decimal number.

Introduction / Context:
This question assesses your ability to convert a simple fraction into an equivalent decimal. This is a fundamental numerical skill that appears in questions involving percentages, profit and loss, and data analysis.

Given Data / Assumptions:

• Given fraction: 3/5.
• We need to write 3/5 in decimal form.
• No rounding is required because the decimal will terminate exactly.

Concept / Approach:
To convert a fraction into a decimal, divide the numerator by the denominator. Since the denominator 5 is a factor of 10, the decimal representation of 3/5 will be a terminating decimal with one digit after the decimal point when expressed carefully.

Step-by-Step Solution:

Verification / Alternative check:
We can also convert by creating an equivalent fraction with denominator 10. Multiply numerator and denominator by 2 to get (3 * 2) / (5 * 2) = 6/10. The fraction 6/10 is directly read as 0.6, which matches our earlier result.

Why Other Options Are Wrong:
0.25 corresponds to 1/4, not 3/5. 0.45 is equal to 9/20. 0.75 equals 3/4. None of these fractions are equal to 3/5, so those options are incorrect.

Common Pitfalls:
Some learners confuse 3/5 with 0.35 because they copy the digits directly, but that is incorrect. Remember that the decimal is derived from division, not simply by placing a decimal point in the numerator. Always perform or mentally check the division.

Final Answer:
The decimal representation of 3/5 is 0.60.