Can you explain how you got that answer for the problem, If Fernando paid $450 for a netbook that was 75% of the original price, what was the original price?

Taking algebra two apex courses and need with these questions

Without multiplying, tell which product is larger and why. 5 × 1/3 or 5 × 2/3 a)5 × 1/3 because 1/3 is less than 2/3 b) 5 × 1/3 because 1/3 is greater than 2/3 c) 5 × 2/3 because 1/3 is less than 23 d) 5 × 23 because 1/3 is greater than 2/3

What is the mean of the data set 125, 141, 213, 155, 281