Question

Calcule as porcentagens
15% de 2100
7% de 8700
5% de 250,00
25% de 800,00

Answer 1

usando regra de 3

15% de 2100:

2100---100%

x---------15%

100x=2100*15

100x=31500

x=31500/100

x=315

7%de 8700:

8700----100%

x----------7%

100x=8700*7

100x=6090

x=60900/100

x=609

5% de 250,00

250----100

x--------5

100x=250*5

100x=1200

x=1200/100

x=12,5

25% de 800,00

800----100

x--------25

100x=800*25

100x=20000

x=20000/100

x=200