Translate the ratio 1:100 into a percent.

• A. 1%
• B. 0.05%
• C. 0.5%
• D. 1.5%

Answer: (A)

Expressing a ratio as a percent means showing how much of something there is per hundred. In a 1:100 ratio, there is 1 unit for every 100 units, which is the same as 1 divided by 100. That fraction equals 0.01, and when you convert a decimal to a percent, you multiply by 100%, giving 1%. So the ratio 1:100 translates to 1%.