2at 6.1 calculations with percentages

Percentages
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Slide 1: Woordweb
WiskundeMiddelbare schoolvwoLeerjaar 2

In deze les zitten 15 slides, met interactieve quizzen en tekstslides.

Onderdelen in deze les

Percentages

Slide 1 - Woordweb

what percentage is 12 out of 57
A
21
B
21,1
C
21,05263158
D
271,4

Slide 2 - Quizvraag

lesson goals
  • I know how ratio tables work.
  • I can calculate the New Price.
  • I know how to use the factor.
  • Assignment for groupwork (criteria)

Slide 3 - Tekstslide

In 2020 the season card of arsenal cost 1200 pounds and this year it has increased by 10%. Calculate the NP?

Slide 4 - Open vraag

Zandbelt wants to buy a laptop but he cant afford to pay 650 Euro. After negotiating he got a discout of 15%. Calculate the NP?

Slide 5 - Open vraag

Lesson goals
I can calculate increase and decrease with percentages
I know the difference between absolute and relative increase

Slide 6 - Tekstslide

Describe in your own words what increase and decrease are

Slide 7 - Open vraag

Slide 8 - Tekstslide

Pascal college had 1278 students in 2016. In 2017 there were 3,6% more. Calculate how many students went to Pascal college in 2017.
A
46
B
46,01
C
1324,008
D
1324

Slide 9 - Quizvraag

Describe in your own words the difference between increase and percentage increase.

Slide 10 - Open vraag

Calculating percentage increase
Percentage increase = 

Example: The price of a €16 book is increased to €18. Calculate the absolute and relative price increase.
Absolute=18 - 16 = €2
Relative= 2/16 x 100 = 12,5%
OLD(increase)100

Slide 11 - Tekstslide

The number of students in a school increased from 1150 to 1223. Calculate the relative increase.
A
6,3%
B
94,0%
C
6,0%
D
73

Slide 12 - Quizvraag

What do you think the formula for calculating percentage decrease will be?

Slide 13 - Open vraag

Homework
Make paragraph 6.1.
Ex. 2 is a test exercise. If you do it correctly, you can skip ex. 3 and 4.

Slide 14 - Tekstslide

Describe in your own words the difference between relative and absolute increase.

Slide 15 - Open vraag