Half of $130 or half of $130.00 is $65.00
$65.00 multiplied by 2 equals $130.00
Or $130.00 minus $65.00 equals out to be $65.00
So if you had to split $130.00 with someone you would give them $65.00 of the $130.00 and keep the other $65.00 for yourself.
The same is true for a half off sale of something that costs $130.00 the half off sale would mean you pay only $65.00
Or if you need to pay half of $130.00 on a bill then you would pay $65.00