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Sagot :

MAUDMARINE

Bonjour,

20 %  = 20/100 = (20 x 1) / (20 x 5) = 1/5

45 %  = 45/100 = (5 x 9) / (5 x 20) = 9/20

70 % = 70/100 = (10 x 7) / (10 x 10) = 7/10

50 % = 50/100 = (50 x 1) / (50 x 2) = 1/2.

FAHILA2005

Réponse :

20/100= 20:5=4 100:5= 50

Explications étape par étape

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