Year 4
Mathematics
Number & Algebra
AC9M4N03
Introduction to Percentages
Per cent means "out of 100". Percentages describe a portion of a whole, just like fractions and decimals.
What You Need to Know
Key Concept Diagram
Per cent (%) means parts per hundred
50% = 50/100 = 1/2, and 25% = 25/100 = 1/4
To find 50% of a number, divide by 2
Percentages, fractions, and decimals all describe the same proportions
Key Vocabulary
Per cent
Out of 100; the symbol is %
Percentage
A number expressed as a fraction of 100
50%
One half — 50 out of every 100
25%
One quarter — 25 out of every 100
Knowledge Check
Select the correct answer for each question. Click "Check Answer" to see if you are right.
Question 1
What is 50% of 80?
Question 2
Which fraction equals 25%?
Question 3
A shirt costs $40 and is 25% off. How much is the discount?
Key Concepts Summary
- ●Per cent (%) means parts per hundred
- ●50% = 50/100 = 1/2, and 25% = 25/100 = 1/4
- ●To find 50% of a number, divide by 2
- ●Percentages, fractions, and decimals all describe the same proportions