What is 0.1 ppm expressed as a percentage?

To express 0.1 parts per million (ppm) as a percentage, it is important to understand the relationship between these two units. One ppm is equivalent to one part in a million, which translates to a fraction out of 1,000,000.

To convert ppm into a percentage, you can use the following formula:

Percentage = (ppm / 1,000,000) × 100

Thus, for 0.1 ppm:

Percentage = (0.1 / 1,000,000) × 100

= 0.1 / 10,000

= 0.00001

This conversion correctly shows that 0.1 ppm is equal to 0.00001%. This demonstrates that the expression of concentration in terms of ppm results in very small percentages, particularly when dealing with values less than 1. This understanding is crucial in fields such as environmental science, where accurately interpreting pollution concentrations can significantly affect assessments of water quality and safety.