Question

Calcule

a) 15% de 1500
b)5% de 240

Answer 1

a-). 15% x 1500 = 225
100
b-). 5% x 240 = 12
100

Answer 2

Vejamos :



$\dfrac{100}{15} =\dfrac{1500}{X}$
$100X = 1500 * 15$
$100X = 22500$
$X =\dfrac{ 22500}{100}$
$X = 225$

$\dfrac{100}{5} =\dfrac{240}{X}$
$100X = 5*240$
$100X = 1200$
$X =\dfrac{1200}{100}$
$X = 12$