9000078910
Level:
B
There is \(19\)
girls and \(12\)
boys in the class. Find the difference between the percentage of the girls and boys in
this class.
\(22.6\, \%\)
\(15.1\, \%\)
\(18.5\, \%\)
\(23.5\, \%\)
Percentages and Financial Mathematics
9000078909
Level:
C
The salary of an employee is decreased by the tax at a flat rate
\(14.5\, \%\). An employee
paid the tax \(\$3\: 683\).
Find his/her take home pay (i.e. the pre-tax income decreased by the tax).
\(\$21\: 717\)
\(\$25\: 400\)
\(\$21\: 971\)
\(\$23\: 352\)
9000078902
Level:
B
If we decrease an unknown number \(x\)
by \(14\, \%\), we
get \(602\).
Find \(x\).
\(700\)
\(686.28\)
\(517.72\)
\(680\)
9000078903
Level:
B
The number \(234\)
is by \(20\, \%\) bigger
than \(x\).
Find \(x\).
\(195\)
\(187.2\)
\(280.8\)
\(205\)
9000078904
Level:
B
The number \(87.5\)
is a \(35\, \%\) from an
unknown number \(x\).
Find \(x\).
\(250\)
\(240\)
\(260\)
\(270\)
9000078905
Level:
B
A new laptop has been introduced to the marked with the original price
\(\$1\: 090\).
Soon after the introduction the price has been increased temporarily by
\(20\, \%\) and after several
months decreased by \(30\, \%\).
Find the final price for the laptop. Round your result to the nearest integer.
\(\$916\)
\(\$981\)
\(\$952\)
\(\$930\)
9000078906
Level:
B
The price of a ship decreased in autumn by
\(16\, \%\) and in spring
increased by \(4\, \%\). This
final price was \(\$367\: 000\).
Find the original price of the ship. (Round to the nearest thousand.)
\(\$420\: 000\)
\(\$417\: 000\)
\(\$409\: 000\)
\(\$415\: 000\)
9000078907
Level:
B
The unknown number \(x\)
has been increased by \(20\, \%\)
and then decreased by \(5\, \%\).
The final value was \(513\).
Find \(x\).
(Round to the closest integer.)
\(450\)
\(446\)
\(430\)
\(436\)
9000078908
Level:
B
A house price in the March was \(\$259\: 000\).
The house has not been sold for several months and the price dropped to
\(\$234\: 000\) in
August. Write the discount as percents of the original price. (Round to the tenth.)
\(9.7\, \%\)
\(10.7\, \%\)
\(10.5\, \%\)
\(9.5\, \%\)
9000078901
Level:
B
If we increase an unknown number \(x\)
by \(5\, \%\), we
get \(378\).
Find \(x\).
\(360\)
\(359.1\)
\(396.9\)
\(350\)