Rounding

.02843 is rounded to .03. The 8 after the 2 rounds up and the 2 becomes a 3. 

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0.02843 x 100 = 2.843  

were you asked to multiply it by 100?   No you were not.

 

Leave the decimal point right where it is

So you need the 0.02  but if the next number is 5 or bigger than 5 then the last digit, the 2 will go up one to 3

Here the 3rd digit after the point is 8, which is a big number (bigger or equal to 5) so the 2 goes up to 3

 

\(0.0 2| \boxed{8}=0.03\qquad \text{To 2 decimal places}\)