The attendance at a seminar in one year was 500 in your to the attendence changed by 100 what was the percent change in attendance

500-100= 400

400/500= 0.8

(0.8) 100= 80% ( I think, I'm not sure )     if not is 40%

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

The volume is 56.8 triangular the