Comment simplifier 17,5 /250

17,5 / 250
= (17,5 x 10) / (250 x 10)
= 175 / 2 500
= (25 x 7) / (25 x 100)
= 7 / 100

17.5/250 = 7/100
ou = 0.07
Pour le 12.5/250 = 12.5/250 = 125/2500 = 5-5-5/2-2-5-5-5-5 = 1/20