Noelle has 5/6 of a yard of purple ribbon and 9/10 of a yard of pink ribbon. how mucho ribbon does se have altogether?

Well you need to find a common denominator which 30 is the closest one. 5/6 becomes 25/30, 9/10 becomes 27/30. 27/30+ 25/30 = 52/30. To simplify that you divide by 2 to get 26/15. It is no longer divisible to a whole number after that point.

The answer is that the rate of change is $50 per 1 monthhope this ; )