Question

A- 100% - 6.000
5% - x

B- 100% - 259
10% - x

Answer 1

Olá, bom dia!

Multiplicação dos meios pelos extremos.

$\;(a)\;\;\dfrac{100\%}{5\%}=\dfrac{6.000}{x}\\\\100x=6.000\cdot5\\100x=30.000\\x=\dfrac{30.000}{100}\\x=300\\\\\\\\\;(b)\;\;\dfrac{100\%}{10\%}=\dfrac{259}{x}\\\\100x=259\cdot10\\100x=2590\\x=\dfrac{2590}{100}\\x=25,9$



Espero ter ajudado.
Bons estudos!