Percentage returns:

i. easily convey the return for each dollar invested.

ii. relay information about a security more easily than dollar returns do.

iii. vary with the amount invested.

iv. can be easily separated into dividend and capital gain yields.

I. easily convey the return for each dollar invested.

Explanation:

Percentage of returns is used to explain the return on an investment relative to the amount invested.

It can also be called a return on investment (ROI). Return on investements is always expressed as percentages or ration and is usually calculated with formula

ROI  =   Current Value of Investment−Cost of Investment       ×     100%

                                Cost of Investment

Cheers.

a. money supply  

have a good day

answer; monopolistic competition;