For number one, you’re decimal is technically after zero. To change your percentage into a real decimal number, move the decimal twice to the left. Then you will get 3.5. 3.5 is also equivalent to 3 1/2. Do the same for numbers 23 and four. For number five, each you need to know that each hole number represents 100%. If you do the math you will realize that 1/2 equals 50%. When you add them together, you get 250%. Do the same for Numbers six, seven, and eight.