Percent problems and financial mathematics

1003082201

Level: 
B
The price of the commodity did not change if
it was lowered by \( 20\% \), and the new price was increased by \( 25\% \).
it was lowered by \( 10\% \), and the new price was increased by \( 10\% \).
it was increased by \( 30\% \), and the new price was lowered by \( 30\% \).
it was increased by \( 20\% \), and the new price was lowered by \( 25\% \).

1003066907

Level: 
B
The results of a survey considering the support for political parties \( Y \) and \( Z \) are presented in the table below. a) How many percentage points have the support for party \( Z \) decreased? b) How much has the percentage of people supporting party \( Y \) increased? \[\begin{array}{|c|c|c|} \hline & \text{February} & \text{March} \\\hline Y & 16\% & 20\% \\\hline Z & 10\% & 8\% \\\hline \end{array}\]
a) by \( 2 \) percentage points, b) by \( 25\% \)
a) by \( 20 \) percentage points, b) by \( 4\% \)
a) by \( 20 \) percentage points, b) by \( 25\% \)
a) by \( 2 \) percentage points, b) by \( 4\% \)

1003066906

Level: 
B
The results of a survey considering the support for political parties \( Y \) and \( Z \) are presented in the table below. a) How many percentage points have the support for party \( Y \) increased? b) How much has the percentage of people supporting party \( Z \) decreased? \[\begin{array}{|c|c|c|} \hline & \text{February} & \text{March} \\\hline Y & 16\% & 20\% \\\hline Z & 10\% & 8\% \\\hline \end{array}\]
a) by \( 4 \) percentage points, b) by \( 20\% \)
a) by \( 25 \) percentage points, b) by \( 2\% \)
a) by \( 25 \) percentage points, b) by \( 20\% \)
a) by \( 4 \) percentage points, b) by \( 2\% \)