The easiest way is if it doesn't need to be simplified. Multiply -2.105 by [tex]\frac{1000}{1000}[/tex]. You get the fraction [tex]-\frac{2105}{1000}[/tex]. While this is technically the answer, you can simplify this down to [tex]\frac{421}{200}[/tex]. Because 421 is a prime number, this can not be simplified any further. Therefore, the solution is [tex]\frac{421}{200}[/tex].
[tex]\frac{421}{200}[/tex].
