Convert 2/5 to both decimal and percent. Which pair is correct?

• A. 0.4 and 40%
• B. 0.5 and 50%
• C. 0.3 and 30%
• D. 0.2 and 20%

Answer: (A)

Converting a fraction to a decimal and then to a percent uses simple division and a quick multiplication step. For two-fifths, divide 2 by 5. That gives 0.4. To turn that decimal into a percent, multiply by 100, which yields 40%. So the correct pair is 0.4 and 40%.

Think of it another way: one-fifth is 0.2, so two-fifths is twice that, which is 0.4, and 0.4 corresponds to 40%. The other options match different fractions (like 1/2, 3/10, or 1/5), not 2/5.