Percentage
==========

Write and save the following functions into the same file named
``percentage.py``.

#. Write a function :py:func:`percentage1` that takes two
   integers, the number of persons in a group, and the number of
   persons in this group that speak English, and returns the
   percentage of persons in that group that speak English (float). Examples:
   
   .. literalinclude:: percentage1.txt
      :language: python3
      :lines: 3-

   .. note::
      More tests are provided in the :download:`percentage1.txt<percentage1.txt>` file.
      
#. Write a function :py:func:`percentage2` that takes the initial
   price of a product and the percentage of VAT (value-added tax) to
   be applied, and returns the final price of that item. All are type
   float values. Examples:
   
   .. literalinclude:: percentage2.txt
      :language: python3
      :lines: 3-

   .. note::lo
      More tests are provided in the :download:`percentage2.txt<percentage2.txt>` file.
      
#. Write a function :py:func:`percentage3` that takes two parameters:
   the price of an oil can at the 'Supersale' mall and the price of
   the same item at the 'Superscam' store, and returns the percentage
   of the price increase of that product at 'Superscam' in relation to
   the price at 'Supersale'. Use the previous function
   :py:func:`percentage1`. Examples:
   
   .. literalinclude:: percentage3.txt
      :language: python3
      :lines: 3-

   .. note::
      More tests are provided in the :download:`percentage3.txt<percentage3.txt>` file. 


.. rubric:: Solution

A solution is provided in the
:download:`percentage.py<solutions/percentage.py>` file.