As this is your homework you need to work this out for yourself or you will not learn how to work out percentages properly. Here is what you must do:-
divide 18 by 100, this gives you what 1% of 18 is. Then multiply this answer by 75 to give you 75%.
(18/100)*75
13.5
Eighteen and seventy-five hundredths in standard notation is 18.75
18.75
570,018
Eighteen billion, nine hundred seventy-five million, five hundred and seventy-eight thousandths.
seventy five percent is three fourths
Thursday
Eighteen and seventy-five hundredths.
Eighteen and seventy-five hundredths
three point seventy five percent. or three and seventy fifths percent.
Seventy-five hundredths or seventy-five percent.
Eighteen and two hundred seventy-five thousandths.