![\frac{2}{5}](/tpl/images/1138/0566/c236b.png)
Step-by-step explanation:
We have two fractions being multiplied and are being asked to simplify it.
When you multiply two fractions, you always multiply across :
![\frac{5}{10}*\frac{4}{5} = \frac{5*4}{10*5}](/tpl/images/1138/0566/ed778.png)
![\frac{20}{50}](/tpl/images/1138/0566/caff6.png)
Since both the numerator and denominator end in 0, we can simplify this by cutting out the zeroes.
Leaving us with B. 2/5