Respuesta :
Answer:
3% are defective
Step-by-step explanation:
400 cars are 100%
12 cars are x %
so x=12*100/400= 12/4=3 %
change/original times 100
change = 400-12
388/400(original)times 100=97
100-97=3 :)
change = 400-12
388/400(original)times 100=97
100-97=3 :)