I know how I'd work this problem and I know the answer, but I'm not sure what methods are generally used in 5th gr and I don't want to confuse an issue. (btw, it's a bonus question and DS said they didn't go over how to do it.)

***About 7/10 of the US population (175,104,000) in 1991 believed saying A to be true. What was the total population?***

I'm so not good at 'teaching'. Even though I know how to do something, I'm not good at relaying the info in a way that makes sense. Guess I know where DS gets it blush.

Can anyone offer up 5th grade ideas for how this type of problem is taught?