2010006202
Level:
B
By how many percent should we shorten the edge of a cube so that its surface area is decreased by \( 19\% \)?
by \( 10\% \)
by \( 19\% \)
by \( 9\% \)
by \( 90\% \)
Percent problems
2010006201
Level:
B
If \( 40\% \) of the number \( 60 \) is by \( 18 \) smaller than \( 60\% \) of the number \( x \), then:
\( x=70 \)
\( x=20 \)
\( x=126 \)
\( x=193 \)
2010001902
Level:
A
Sport shoes cost \( 112 \) EUR after a \( 40\% \) price increase. How much did the same shoes cost before the price increase?
\( 80 \) EUR
\( 28 \) EUR
\( 78.4 \) EUR
\( 67.2 \) EUR
2010001901
Level:
A
A \( 5\,\mathrm{kg} \) sugar solution was prepared by dissolving \( 400 \) g of sugar in water. Calculate the percentage concentration of the solution.
\( 8\% \)
\( 12.5\% \)
\( 80\% \)
\( 16\% \)
Percentages -- Figures
Submitted by ladislav.foltyn on Fri, 04/19/2019 - 16:44Percent -- Numbers
Question:
Convert each of the following decimals, fractions and mixed numbers to a percentage:
1003090508
Level:
C
A factory is supplied with raw materials by rail. Due to the renovation of the track, the time of passing the goods from the warehouse to the factory increased by \( 25\% \). How much did the average speed of carriage on the delivery route decrease?
by \( 20\% \)
by \( 25\% \)
by \( 4\% \)
by \( 75\% \)
1003090507
Level:
C
A certain amount of money was put into a bank account for an annual deposit of \( 3.5\% \) per year. After a year the bank paid a tax in the amount of \( 14 \) zlotys from the gained interests. What amount was placed on the deposit if the interest tax amounted to \( 20\% \)?
\( 2000 \) zlotys
\( 2500 \) zlotys
\( 3000 \) zlotys
\( 1400 \) zlotys
1003090506
Level:
C
The interest rate on deposits in a certain bank initially equaled \( 5\% \) per year but then it was decreased by \( 20\% \). By how many percentage points has the interest rate decreased?
by \( 1\) percentage point
by \( 1.2 \) percentage point
by \( 2 \) percentage points
by \( 2.1 \) percentage point
1003090505
Level:
C
The interest rate on deposits in a certain bank initially equaled \( 5\% \) per year but then it was increased by \( 1.2 \) percentage point. What was the percentage increase of the interest rate?
\( 24\% \)
\( 6\% \)
\( 6.2\% \)
\( 20\% \)