100 + 300 + 500 + 500 + 600 = 2000. Then divide by 5 to get 400.
The mean of these five numbers is 400.
100, 200, 300, 400, 500, 600.
They are: 100 200 300 400 500 and 600
100, 200, 300, 400, 500, 600, 700.
It is 500.
100, 200, 300, 400, 500, 600, 700, 800, 900
The average is 450.
100, 200, 300, 400, 500, 600, 700, 800, 900, 1000
100, 200, 300, 400, 500, 600, 700, 800, 900
% rate:= 600/300 * 100%= 2 * 100%= 200%
100 + 500= 600.
100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, . . .
The nearest 100 is 500.