Exprime des proportions à partir du tableau ci-dessous :

by C. Chalmin & M. Jacoulot

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Comment the results of a poll on a class of 25 pupils
raisehand.gif
usually raise [...] hand
Kid_with_gum.gif
often chew gum
CHEATING.gif
never cheat
snooze.gif
sometimes sleep
12
6
25
1


raisehand.gif
12 pupils usually raise their hand.
percent of the pupils usually raise their hands.
of the pupils usually raise their hands. (fraction)

Kid_with_gum.gif
often chew gum.
often chew gum.
often chew gum.

CHEATING.gif
.
.

snooze.gif
.
.