Offtopic » What was the retailer's actual percentage markup on the coats ??

Hello,

A clothing retailer purchased a line of fall leather coats which were priced to sell at $600 each. This price reflected a markup of 45% on the selling price. At the end of the season the retailer had three coats left, which were marked down 25% and sold. What was the retailer's actual percentage markup on the coats that were sold at 25% off? Calculate this percentage both as a percentage of the selling price, and as a percentage of the cost price.

Please help.

I didn't find the right solution from the internet.

References:
https://www.math10.com/forum/viewtopic.php?f=5&t=1250
Wealth Management Solution Example

Thank you