Bonjour !
a. 76/12 = 38/6 = 19/3
b. 50/100 = 5/10 = 1/2
c. 7/5 = 28/20 = 140/100
d. 16/100 = 4/25 = 32/200
Explications étape par étape :
a. 76/12 = (38*2)/(6*2) = 38/6 = (19*2)/(3*2) = 19/3
b. 50/100 = (5*10)/(10*10) = 5/10 = (1*5)/(2*5) = 1/2
c. 7/5 = (7*4)/(5*4) = 28/20 = (28*5)/(20*5) = 140/100
d. 16/100 = (4*4)/(25*4) = 4/25 = (4*8)/(25*8) = 32/200
J'espère t'avoir aidé. Bon courage !
