What Are Percentages?
Dealing with fractions can be difficult when you are performing mathematical operations in your daily lives. And percentages are another form of fraction; which causes havoc in the minds of the students. For instance, if you run a store, and you are telling the suppliers that 4/5th of your inventory is finished. He will most probably don’t understand you. Or you want to tell your customers that they get a 1/3rd discount on their entire purchase because of Christmas, they wouldn’t be using calculators at your store. Thus, comes the concept of percentage. It provides another way of representing factions and decimals. It just means per hundred. So, if you get 50%, that means 50 per hundred or half. A definite upgrade to the complicated decimal or fraction representation.
Since we are working on percentages, these fit in nicely. Example: A car can run 11.45 km. per gallon of gas. If the tank holds 11.67 gallons of gas, how far (rounded off to second place of decimal) can the car run on one tank of gas?
We put all of the skills to use in story problems. Example problem: In a school, 384 students like Math, 232 like English and 184 like History. Find the percentage of students that like Math, English and History respectively?