Don't stress guys. I told you all this is something new. I also said that nobody knows how to work the problems like this. We will keep working problems like this tomorrow. You will be learning the old method tomorrow.
With tonight's homework you can always divide the value by the number of fives that make up the percent. To do this:
1. mark the percent given in the problem
2. Count all the 5's that make up the percent from the problem
3. Divide the value given in the problem by the number of 5's.
4. Take that number and multiply by 20 to get the final answer.
I hope this helps