Question 30724
{{{ (12a^2b^-2c^2)/(2a^4bc^-1) }}}
Let's divide it out into 4 separats fractions.
{{{ (12/2)(a^2/a^4)(b^-2/b^1)(c^2/c^-1) }}} simplify each fraction.  Remeber when dealing with exponents and division, we subtract the exponents. 
{{{ (6/1)(a^-2/1)(b^-3/1)(c^3/1) }}} Anything with a negative exponet moves to the other side of the fraction and becomes positive
{{{ (6/1)(1/a^2)(1/b^3)(c^3/1) }}} Multiply straight across
{{{ (6c^3)/(a^2b^3) }}}