Question

Qual o valor de
1) 15% de 300
2- 80% de 1200
3- 9% de 50.000
4- 31% de 2.500
5- 43% de 7.200​

Answer 1

$\large 1) ~ 15 \% ~de~ 300 ~ \Rightarrow ~ 45\\\\\large 2) ~ 80 \% ~ de~ 1200 ~ \Rightarrow ~ 960\\\\\large 3) ~ 9 \% ~de~ 50.000 ~ \Rightarrow ~ 4500\\\\\large 4) ~ 31 \% ~de~ 2500 ~ \Rightarrow ~775\\\\ \large 5) ~ 43 \% ~de~ 7200 ~ \Rightarrow ~ 3096$

Formula:

$Raz\tilde{a}o ~ = \dfrac{p}{100} ~. ~( valor ~que ~se ~quer~ encontrar ~a ~porcentagem)$

$1)~ 15 \% ~de~ 300\\\\\\p = \dfrac{15}{100} ~. ~300\\\\\\p = \dfrac{3}{20} ~. ~300 \\\\\\p = \dfrac{3 . 300}{20}\\\\\\ p = \dfrac{900}{20}\\\\\\p = 45$                       $2)~ 80 \% ~de~ 1200\\\\\\p = \dfrac{80}{100} ~. ~1200\\\\\\p = \dfrac{4}{5} ~. ~1200 \\\\\\p = \dfrac{4 . 1200}{5}\\\\\\ p = \dfrac{4800}{5}\\\\\\p = 960$        

$3)~ 9 \% ~de~ 50.000\\\\\\p = \dfrac{9}{100} ~. ~50.000\\\\\\p = \dfrac{9~ .~ 50000}{100}\\\\\\ p = \dfrac{450000}{100}\\\\\\p = 4500$                     $4)~ 31 \% ~de~ 2500\\\\\\p = \dfrac{31}{100} ~. ~2500\\\\\\p = \dfrac{31 . 2500}{5}\\\\\\ p = \dfrac{77500}{100}\\\\\\p = 775$

$5) ~ 43 \% ~de~7200\\\\\\p = \dfrac{43}{100} ~. ~7200 \\\\\\p = \dfrac{43 ~. ~7200}{100}\\\\\\ p = \dfrac{309600}{100}\\\\\\p = 3096$

===

Para saber mais:

https://brainly.com.br/tarefa/44059751

https://brainly.com.br/tarefa/12253002