Question

Determine a) 4/5de 420 b)a metade de 3/7 c) 3/4 de 640

Answer 1

a) $\frac{4}{5} *420= \frac{1680}{5} = 336$

b) $\frac{1}{2} * \frac{3}{7} = \frac{3}{14}$

c) $\frac{3}{4} *640= \frac{1920}{4} = 480$