$100,000 sale @ 25% normal commission would be $25K commission.
40% off of 25K normal commission would be = 0.40 * $25,000 = $10,000 off.
$10,000 off of $25,000 = $15,000 discounted commission.
Therefore the discounted $15,000 commission is 40% off of the normal $25,000 commission.
I still...