Round a Decimal to two decimal places

I don't think it gets more concise than this:

Decimal toround = 3.14159265;
Decimal rounded = toround.setScale(2);
system.debug(rounded);

What's nice about this one is you can use the setScale overload that lets you specify the rounding mode you want to use.

Decimal toround = 3.14159265;
Decimal rounded = toRound.setScale(2, RoundingMode.HALF_UP);
system.debug(rounded);

In this case - I think you'll want the HALF_UP rounding mode. It's the traditional round to nearest, but round .5 up.