A salt mixture has 7 parts water and 1 part salt. Suppose another part of salt is added. What is the new ratio of salt to water?

The mixture starts with 7 parts water and 1 part salt. Adding another part of salt makes 2 parts salt while the water stays at 7 parts, so the new salt-to-water ratio is 2 to 7. The correct choice is C, 2 to 7.

AI-written and checked against the verified answer.