A ski shop has a markup rate of 50% find the selling price of skis that cost the store owner $300. tell me how you got the answer

If nthe shop has a mark up rate of 50% and they cost 300 to buy you multiply 300 by 50% convert 50% to decimal

so you do. 5*300=150

then you add 150 to 300 which means that the shop sells the skis for 450 dollars.