What is the correct method to convert decimal to percent?

• A. Divide by 100 and add a percent sign
• B. Subtract 1 then multiply by 100
• C. Add 100 and remove decimal
• D. Multiply by 100 and add a percent sign

Answer: (D)

Converting a decimal to a percent means scaling the number by 100 and adding a percent sign. Since a percent is per hundred, you express the decimal as parts out of 100 by multiplying by 100. For example, 0.53 × 100 = 53, so it becomes 53%. Similarly, 0.01 becomes 1%, and 1 becomes 100%.

Dividing by 100 would turn a percent back into a decimal, not into a percent. Subtracting 1 and then multiplying by 100 doesn’t reflect the correct conversion, and adding 100 with some decimal adjustment isn’t a valid method here. So multiplying by 100 and adding a percent sign is the correct approach.