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Sagot :

AYUDA

46

a

x 5% = x 5 : 100 => R3

b

12% de 150 = 12 : 100 x 150 = 18 => R1

c

prix initial - remise 10% = prix final

soit

40 - 40 x 10% = 36 => R2

d

prix initial + augmentation = prix final

=> augmentation = prix final - prix initial = 0,70 - 0,68 = 0,02

l'augmentation 0,68 x taux = 0,02

=> R3

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