Answer:
the required reserve ratio is 6.25%
Step-by-step explanation:
The calculation of the required reserve ratio is given below:
Required reserve ratio is 
= required reserves ÷ deposits 
 = $25 ÷ $400 
 = 0.0625 
 = 6.25% 
 Hence, the required reserve ratio is 6.25%
The same is to be relevant and considered too