Which of the following fractions give a decimal answer whose non-zero digits repeat infinity many times?

News cameras take an overhead picture of a crowd at an outdoor event journalist then count the total number of people in the picture and use the sample of estimate the total number of people in the crowd this process is an example of

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

Write 17/20 as a decimal and as a percent.