Bonsoir,
1)
(250 * 15)/100 =37,50
250 - 37,50 =>212,50€
2)
300 * 1,2 = 360
(360 *20)/100 = 72
360 -72 =>288€
3)
500* 1,3 = 650
650 * 1,3 = 845
[(845 -500 ) / 500] *100 => 69% d'augmentation
