Explicație pas cu pas:

am adunat elevii=30

daca 30 elevi .......100%

2 elevi ..........x

3 elevi...........y

5elevi ..........z

x= 2x100/30

×= 20/3

×= 6,6%

y= 3x100/30

y= 30/3

y= 10%

z= 5x100/30

z= 500/30

z= 50/3

z= 16,6%

si tot asa .spor