Question

quanto custa 750 gramas de carne se 500 gramas custa R$16,40?

Answer 1

500   16,40

750     x

500x= 16,40.750

500x=12300

123/5=x

x=24,60

Answer 2

$\frac{750}{x} =\frac{500}{16,40} \\\\Multiplicando cruzado temos:\\\\500x = 12300\\       x = 12300/500\\        x= 24,60$