Answer :

[tex]\frac{2}{5} \ of \ 128= \frac{2}{5}*128= \\\\ = 2* 25.6= \\\\ =\boxed{51.2}[/tex]


2/5 of 128

of means multiplication so

2/5 x 128=

2/5 x 128/1

256/5 would be the answer but you have to divide

256/5= 51.2

so the answer to 2/5 of 128 would be 51.2