How can you solve problems using percents?

Can anyone me with 32,33,36,37,and 40.

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. solve this quadratic equation using the quadratic formula. 2x2 - 2x=1 need asap