Question

Pra agora,me ajudemmm

Answer 1

Dá para resolver todos os problemas na regra de três:

10. 5 630,00 --- 100% 5 630.32 = 100X

X --- 32% 180 160 = 100X

X = 180 160/100

X = 1 801,60

5 630,00 - 1 801,60 = R$ 3 828,40

11. 19,80 --- 100% 19,80.15 = 100X

X --- 15% 297 = 100X

X = 297/100 = 2,97

19,80 - 2,97 = R$ 16,83

12. 12 778,00 --- 100% 12 778X = 999 000

9 990,00 --- X% X = 999 000/ 12 778

X = 78%

100% - 78% = Redução de 22%

13. 13 600 --- 100% 13 600X = 1 020 000

10 200 --- X% X = 1 020 000/13600

X = 75%

100% - 75%= Redução de 25%