Réponse:
29,99_______100%
x___________40%
x=40×29,99÷100
x=11,99
29,99-11,99=18
18______100%
y________10%
y=18×10÷100
y=1,8
29,99-(11+1,8)=17,2€
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Réponse:
29,99_______100%
x___________40%
x=40×29,99÷100
x=11,99
29,99-11,99=18
18______100%
y________10%
y=18×10÷100
y=1,8
29,99-(11+1,8)=17,2€