Question 948310
Let's start with X.
Increase it by 20%.
{{{X+(20/100)X=X+0.2X=1.2X}}}
Now decrease by 20%.
{{{1.2X-(20/100)(1.2X)=1.2X-0.24X=0.96X}}}
So the difference from start to finish is,
{{{X-0.96X=0.04X}}} or 4% reduction.