Question

C 8% de 500 D 18% de 45 E 20% de 150 F 5% de 420

Answer 1

Resposta:regra de três

Explicação passo a passo:

c)500----100

X ----8

100X=4000

X=4000÷100

X=40

d)45---100

X ---18

100X=810

X=8,1

e)150---100

X ---20

100X=3000

X=3000÷100

X=30

f)420---100

X ---5

100X=2100

X=2100÷100

X=21