Math problems, percentages

How do you do percentage math problems?

You Get A Texas Caculator And you Put in the Number That You Want To Put In A Percent And Enter It In The number And Then Press 2nd And Then The Percentage Button.but you have to have a texas caculator to do it

Texas Instruments . . .

Do you mean something like, What percentage is 30 of 52?

Then you just do;

30 / 52 press equals

then times it by 100

should get, 57.69...%