Bonjour;
on part de 100
100/2 = 50
100 -10% de 100
100-(10*100) /100
100-10
= 90
90-10%de 90
90- (10*90)/100
=90- 9
= 81
81-10% de 81
81- (10*81)/100
=81 -8,10
= 72,9
72,9 - 10% de 72,9
= 72-(10*72,9)/100
= 72 - 7,29
= 64,71
64,71 - (10% de 64,71)
64,71 - (10*64,71)/100
64,71 -6,47
=58,24
58,24 - ( 10*58, 24)/100
= 58,24 - 5,82
= 52,42
52,42 -( 10*52,42)/100
= 52,42- 5,24
= 47, 18
7 fois
