Răspuns:
Explicație pas cu pas:
a)
450 elevi ....... 360°
100 elevi ........100 x 360° : 450 = 80°
75 elevi ........ 75 x 360° : 450 = 60°
125 elevi ........ 125 x 360° : 450 = 100°
150 elevi ........ 150 x 360° : 450 = 120°
b)
450 elevi ............ 100
100 elevi ........ 100 x 100 : 450 = 22,2% rotunjit la 22%
75 elevi ........ 75 x 100 : 450 = 16,(6)% rotunjit la 17%
125 elevi ........ 125 x 100 : 450 = 27,(7)% rotunjit la 28%
150 elevi ........ 150 x 100 : 450 = 33,(3)% rotunjit la 33%
