1. Section 3.3 Evaluating the Percent of a Number
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2. Review: Write each of the following percentages in decimal form
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3. Percentage of a Number
When looking for the “percentage” of a number, multiply the number by the percentage
Sometimes it’s easier to convert the percentage to decimal form first
Ie: Find 50% of $60
So 50% of $60 is $30
Some percentages are easy to find, like 10% is 0.1, 20% is 0.2, 30% is 0.3 ,.... and 100% is 1.00
Note: When asked to find 100% of a number, it is basically the number itself
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4. Ex: Evaluate the given percentage for each number:
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5. Note: all percentages can be written as a fraction
When looking for the percentage of a number, it may be easier to just multiply by the corresponding fraction
Ie: Find 75% of 124
75% is equal to ¾
In the text book, there are questions that want us to find a fraction of a percent
ie: Find ¼% of 50
¼ % is not the same as 0.25
it is actually 0.25 ÷ 100
Which is
So multiply the number by the fraction AND then divide by 100
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6. Practice: Find the percentage of each number
When asked to find a fractional percent of a number, multiply that number by the fraction and divide by 100

7. In some cases, it is better to breakup the percentage as the sum of two or more percentages that are easier to calculate
Ie: Calculate 11% of 350
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8. Practice: Jason is applying for a program at UBC
Practice: Jason is applying for a program at UBC. In order to be accepted he needs to get at least 68% on the entrance exam. If the maximum score on the exam is 120pts, what is the minimum score that Jason needs to get?
Jason needs 81.6 points on the entrance exam to be accepted in the program at UBC
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9. Homework:
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