Answer:

Explanation:
we know that 
To Round a number 
a) Decide which is the last digit to keep 
b) Leave it the same if the next digit is less than 
 (this is called rounding down)
 (this is called rounding down) 
c) But increase it by 
 if the next digit is
 if the next digit is 
 or more (this is called rounding up)
 or more (this is called rounding up) 
In this problem we have 
 
 
We want to keep the digit 
 
 
The next digit is 
 which is greater or equal than
 which is greater or equal than 
 , so increase the
, so increase the 
 by 1 to
 by 1 to 

therefore 
the answer is 
