Chapter 3 (Math) Section 3A study set.
what are 3 basic ways to use percentages?
1. Percentages can be used to express a fraction of something. For example, out of 15,000 employees, 3% lost their jobs. 2. Percentages can be used to describe a change in something. For example, the cost of milk rose 5% within the past month. 3. Percentages can be used to compare two things. For example, the car costs 25% more but gets 10% more miles per gallon.
what is the definition of absolute difference?
Absolute difference is the actual difference between the compared value and the reference value
How are the meanings for the key words "of" and "more than" meanings related (when dealing with percentages?
If the compared value is P% more than the reference value, it is (100plusP)% of the reference value.
What is the difference between the terms "percent" (%) and "percentage points"?
Percent is used to describe a relative change or difference. Percentage points are used to describe an absolute change or difference.
what is the definition of relative difference?
Relative difference describes the size of the absolute difference in comparison to the reference value and can be expressed as a percentage.
does this statement make sense? "In many European countries, the percentage change in population has been negative in recent decades."
The statement makes sense. A percentage change in population can be negative if the data reflects that.
Give an example of how "percent" (%) and "percentage points" can differ for the same situation. Choose the correct answer below.
a savings account that previously offered 2% interest now offers 6% interest, then the percent increase is 200% and the percentage point increase is 4.
what is the difference between the key words 'of' and 'more than' when dealing with percentages.
difference: more than - used to express the relative change between the REFERENCED value and the COMPARED value of - used to express the RATIO of the compared value to the referenced value.
