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Sagot :

1,15*20/100 = 0,23
1,15-0,23 = 0,92
1,15/100 = 0.0115 c’est 1%
0.0115*20 = 0.23 c’est 20%
1,15€ - 0.23€ = 0.92€

On va payer 0.92€

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