Perform the required calculations for each of the following items. Round your answers to the nearest 0.1%. 20 is how much less than 30? What percent less?

25 is how much more than 20? What percent more?

37 is what percent more than 32?

300 is what percent less than 599?

184 is what percent more than 148?

102 is what percent more than 50?

16 is what percent less than 489?

216 is what percent greater than 80?

418 is what percent smaller than 516?

please I don't understand how people are getting the answers they're getting.