%
100

Last year, a litre of oil cost 3.95€. This year, it 

costs 4.90€. What is the percentage increase?

24%

200

24 students in a class passed all their exams. This 

was 75 % of the class. 

a) How many students are there in the class? 

b) By the end of the school year, 87.5 % of the class had passed all the exams. How many students failed?

a)32 students are in total

b)28 students have passed all the exams

300

In a handball tournament, player A scored 2/5 

of 30 attempts. Player B scored 6 out of 16 attempts 

and player C scored 36 % of 25 attempts. 

a)How many goals did each player score? 

b)What percentage of the total goals did each player score?

A:12 goals    40%

B:6 goals     37,5%

C:9 goals     36%

400

A building was initially valued at one and a half 

million Euros. It eventually cost two million one 

hundred thousand Euros. Calculate the percentage 

increase from the valued cost to the real cost.

The percentage increase is 40%

500

The price of a video game increased by 28 %. It 

was then reduced by 30 %. It originally cost 58 €. 

Calculate the variation index and the final price.

Final price: 51.97 €

Variation index0.896

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