# Percentages 3 - Compound

Percentages 4 - Compound Interest
How do we calculate the interest on money in our bank?
5 questions - Are you ready?
1 / 27
Slide 1: Tekstslide
MathematicsUpper Secondary (Key Stage 4)GCSE

In deze les zitten 27 slides, met interactieve quizzen en tekstslides.

## Onderdelen in deze les

Percentages 4 - Compound Interest
How do we calculate the interest on money in our bank?
5 questions - Are you ready?

#### Slide 1 -Tekstslide

What is 20% of 150?
A
25
B
50
C
40
D
30

Find 30% of 200.
A
50
B
70
C
40
D
60

#### Slide 3 -Quizvraag

Calculate 15% of 80.
A
12
B
10
C
20
D
25

#### Slide 4 -Quizvraag

What percentage of 120 is 24?
A
30
B
15
C
20
D
25

#### Slide 5 -Quizvraag

If 40% of a number is 80, what is the number?
A
150
B
200
C
250
D
100

#### Slide 6 -Quizvraag

Percentage Multipliers
If I want 30% of £52:
0.3 x 52

If I want 79% of £385
0.79 x 385

#### Slide 7 -Tekstslide

Percentage Multipliers
If I want 30% increase on £52:
100% +30% of 52
1.3 x 52

If I want 79% decrease on £385
100%-79% of 385
0.21 x 385

#### Slide 8 -Tekstslide

What is the multiplier for a 75% increase?
A
1.25
B
2.0
C
0.75
D
1.75

#### Slide 9 -Quizvraag

What is the multiplier for a 15% decrease?
A
0.15
B
1.15
C
0.85
D
0.85

#### Slide 10 -Quizvraag

What is the multiplier for a 50% increase?
A
2.50
B
1.50
C
1.0
D
0.50

#### Slide 11 -Quizvraag

What is the multiplier for a 10% decrease?
A
0.90
B
1.10
C
0.10
D
0.20

#### Slide 12 -Quizvraag

What is the multiplier for a 25% increase?
A
2.0
B
1.25
C
0.25
D
1.5

#### Slide 17 -Open vraag

If I want 24% Decrease on £490, what is my calculation?

#### Slide 20 -Tekstslide

Compound Interest
If Lili puts £1500 in a savings account with 3% interest per annum and leaves it for 5 years, how much will be in the account at the end?

#### Slide 21 -Tekstslide

Compound Interest
If Daisy puts £3200 in a savings account with 2% interest per annum and leaves it for 3 years, how much will be in the account at the end?

#### Slide 23 -Tekstslide

If £1000 is invested at 5% annual interest, how much would be in the account after 3 years with compound interest?
A
£1157.63
B
£1200.00
C
£1150.00
D
£1100.00

#### Slide 24 -Quizvraag

What is the amount in the account after 4 years if £2000 is invested at 8% compound interest annually?
A
£2500.00
B
£2677.12
C
£2700.00
D
£2600.00

#### Slide 25 -Quizvraag

If £1500 is invested at 6% annual interest, how much would be in the account after 5 years with compound interest?
A
£1900.00
B
£2100.00
C
£2000.00
D
£2011.58

#### Slide 26 -Quizvraag

How do you feel that went?
Great
Good
Ok
Not great
Huh?