Question

30% de 1640? Conta armada

Answer 1

30% de 1.640:

30/100 × 1.640

3/10 × 1.640

4.920/10

492.

:)

Answer 2

$\frac{1640}{x} = \frac{100\%}{30\%}$

$100x = 1640 \times 30$

$100x = 49.200$

$x = \frac{49.200}{100}$

$x = 492$

Ou

$30\% = \frac{30}{100} = 0,3 \times 1640 = 492$