Distance ran by Rudy on Monday = 2 km Percentage of increase in distance of running each day = 15% Let us assume that the day on which Rudy will run 4 km = x Then 2 + 0.15x = 4 0.15x = 2 x = 2/0.15 = 13.3 From the above deduction we can conclude that Rudy will run more than 4 km on the 14th day or on Sunday. I hope the procedure is clear enough for you to understand.
