
Doug C. answered 01/26/22
Math Tutor with Reputation to make difficult concepts understandable
It's easier to see if you convert all the fractions to have a common denominator (in this case 10).
So: 9/10, 8/10, 7/10, 6/10... Do you see the pattern? The denominators are staying the same, and the numerators are decreasing by 1 for each successive term.