# Test: Percentages II - Challenging

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Question 1:   The girl ate three apples out of four. What is percentage of eaten apples?
$75%$
$40%$
$30%$
$70%$
Question 2:   The length of the rectangular plot is $200meters$ and the width is $20%$ of the length. 25% of this plot was ploughed. How many hectares was not ploughed?
$0.6ha$
$0.06ha$
$60ha$
$6ha$
Question 3:   Find sum of $15%$ of $15$ and $34%$ of $16$
$9.67$
$7.69$
$769$
$76.9$
Question 4:   Find $12%$ of a sum of $1.6+5.1$
$84$
$0.84$
$840$
$8.4$
Question 5:   The side of one square is $6cm$ and is $15%$ of the side of another square. Find the perimeter of the larger square.
$100cm$
$160cm$
$16cm$
$60cm$
Question 6:   As a result of the machine's improvement, the cutting speed increased from $24m/\mathrm{min}$ to $27m/\mathrm{min}$. How much did productivity increase?
$12.5%$
$25%$
$125%$
$1.25%$
Question 7:   One of the adjacent angles is $25%$ of the other. Find these angles
${140}^{0},{30}^{0}$
${100}^{0},{80}^{0}$
${144}^{0},{36}^{0}$
${155}^{0},{25}^{0}$
Question 8:   A cubic shaped tank with a $1m$ edge is filled with water by 67%. Find a volume of water in the tank.
$6.7{m}^{3}$
$67{m}^{3}$
$1{m}^{3}$
$0.67{m}^{3}$
Question 9:   From milk it is possible to get $6.3%$ of Parmigiano cheese. How much milk do you need to get $8kg$ of cheese?
$100kg$
$126kg$
$126\frac{62}{63}kg$
$12.6kg$
Question 10:   Find $27%$ of $6\frac{1}{4}×8+3\frac{2}{3}:\left(-5.5\right)$
$-13.23$
$132.3$
$1323$
$13.23$