bonjour
16
70,00 x 30 % = 70 x 1.3 = 91
310 x 20% = 310 x 1.2 = 372
99.50 x 10% = 99.5 x 1.1 = 109.45
13.4 x 5 % = 13.4 x 1.05 = 14.07
17
17 augmenté de 42 % = 17 x 1.42 = 24.14
x augmenté de 23 % = x * 1.23 = 553.5 x = 450
80 diminué de 35 % = 80 x 0.65 = 52
x diminué de 26 % = x * 0.74 = 12.95 x = 17.50
