(1) As can be seen from the figure, the number of cleaning receptions accounts for 1/2 of the total number. So 9 1 class size is: 25 divided by 1/2=50 (people).

(2) The number of people going to nursing homes is 1/5 of the total number of people, so the number of people going to nursing homes is 50x 1/5= 10 (people). Just draw a column chart in the chart and mark the numbers.

(3) About: 800x 1/5= 160 (person).