Jane will receive 18% less of her regular pay when she retires. her regular pay is $500 per week. how much would she receive per week if she retires today? then explain how you would calculate this using 100%-18%=82%

1. a music store marks up the instruments it sells by 30%. a. if the store bought a guitar for $45, what will be its store price? b. if the price tag on a trumpet says $104, how much did the store pay for it? c. if the store paid $75 for a clarinet and sold it for $100, did the store mark up the price by 30%?