1. LO: TBAT calculate a percentage of an amount using a calculator
Title: Percentages of amounts
Key Word
Multiplier - what you multiply by

2. The Word 'of' means to multiply e.g. 23% of 80 means 23% x 80
We can do 23% x 80, as we can re-write 23% as a decimal.
Remember, to turn a percentage into a decimal you divide by 100.
so 23% = 0.23
23% of 80 = 0.23 x 80

3. Which of the following is the correct multiplication for
A) 31 x 18
B) 3.1 x 18
C) 0.31 x 18
D) x 18

4. Example 1
Calculate 3% of 97
1) Write 3% as a decimal % = 0.03
2) Now do the multiplication (of means multiply)
0.03 x 97 = 2.91

5. Example 2
Calculate 207% of 31
1) Write 207% as a decimal % = 2.07
2) Now do the multiplication (of means multiply)
2.07 x 31 = 64.17

6. Which of the following is the correct answer:
B) 658
C) 58.8
D) 0.84

7. Which of the following is the correct answer:
B) 6888
C) 688.8
D) 68.88

8. Which of the following is the correct answer:
B) 6.783
C) 67.83
D) 6.65

9. Do these. Write Question and show working
Need Practise?
Do these. Write Question and show working
1) 16% of 76
2) 49% of 178
3) 21% of 73
4) 4% of 27
5) 7% of 91
6) 3% of 146
7) 126% of 7
8) 179% of 45
9) 207% of 67
10) 27.9% of 18
11) 14.5% of 29
12) % of 87
Got it? Try this

10. Answer the question that best reflects your understanding of today's lesson: