I need some help!lol

How to use order of operation in 20 divide by 4 multiply 5 = 1

One of every 20 customers reports poor customer service on your company’s customer satisfaction survey. you have just created a new process that should cut the number of poor customer service complaints in half. what percentage of customers would you expect to report poor service after this process is implemented? 1.) 5% 2.) 10% 3.) 2% 4.) 2.5%

How many 2/5s are in 1 and 1/2 plz someone me right now