3.1)

A jacket had an old price of $$40$, but it now has a $10$ % discount.

a)

Use the two-step method to find the discount and the new price.

b)

Use the new percentage you have to pay to find the new price in just one step.

3.2)

In February, a jacket costs $$40$. In March, the price is increased by $10$ %.

a)

Find the increase in price.

b)

Find the new price by adding the increase to the old price.

3.3)

A bike costs $$400$ in May. In July, the price is reduced by $30$ %.

a)

Use the two-step method to find the new price.

b)

Use the percentage you have to pay to find the new price.

3.4)

A jacket costs $$40$ in November, and the price is increased by $$5$ in December. Find the price increase in percent.

3.5)

A bike costs $$400$ in May. In July, the store has a sale, and the price of the bike is reduced by $$160$.

a)

Find the new price.

b)

Find the price change in percent.

c)

Calculate (or estimate) what percentage of the old price the new price is.

d)

Do you see a connection between the answers in b) and c)?

3.6)

In December, a computer costs $$810$. The price is reduced by $30$ % in March. Estimate how much you would have to pay for the computer in March.

3.7)

A smartphone costs $$390$ in December. In March, the price is reduced by $40$ %. Estimate how much the smartphone costs in March.

3.8)

In December, an armchair costs $$620$. The price is reduced by $70$ % in January.

a)

Estimate how much you have to pay for the armchair in January.

b)

Use a calculator to find the exact price.

3.9)

In December, a bed costs $$540$. The price is reduced by $60$ % in January.

a)

Estimate how much you have to pay for the bed in January.

b)

Use a calculator to find the exact price.

3.10)

A Segway costs $$590$ in December. In January, the price is reduced by $40$ %.

a)

Estimate how much you have to pay for the Segway.

b)

Use a calculator to find the exact price.

3.11)

A jacket costs $$40$ in February. In March, the price is increased by $10$ %. In April, the price from March is then reduced by $10$ %.

a)

Find the increase in price between February and March, and find out what the jacket costs in March.

b)

Find out how much the $10$ % decrease in price between March and April was.

c)

Find the price of the jacket in April.

3.12)

A t-shirt costs $$10$ in February. In March, the price is reduced by $20$ %. In April, the March price is increased by $20$ %.

a)

Find out what the discount and the new price was in March.

b)

Find out how much the price increased between March and April.

c)

Find the new price in April.

You can find the solutions here.