How to write 12/16, and 2/3 as percents

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

Which number line represents the solution set for the inequality -1/2x> 24?

The area of a circle is equal to 1 dm². find the radius of the circle.