Here are more examples:
FAVORITE MONTH: July 40% September 30% August 20% October 10% TOTAL RESPONSES: 2000 QUESTION: How many people picked September as their favorite month? PROBLEM: 2000 * 30% = 600. ANSWER: 600
FAVORITE STATE: Idaho 30% Utah 25% Nevada 20% Montana 15% Other 10% TOTAL RESPONSES: 6000. QUESTION: How many people picked Nevada as their favorite state? PROBLEM: 6000 * 20% = 1200 ANSWER: 1200
Now you get to try a few for yourself.