The sales price would be $7.50, and with $7.50 off, the new price would be $42.50. I have never been good at percentages but here’s how I do it...
If it’s a percent then it’s fraction is just the number above an 100 then multiply that b the original price
15/100•50=7.5
How to remember is, what is 15% of 50? And “of” always means multiply so just multiply them
Hope this helps!