Fractional change is change over initial value
==============================================

Fractional change of a quantity is defined as ratio of the linear change of the quantity
to the initial value of the quantity.

.. py:currentmodule:: symplyphysics.laws.quantities.fractional_change_is_change_over_initial_value

.. py:data:: fractional_change

    :attr:`~symplyphysics.symbols.basic.fractional_change` of quantity :math:`X`.

Symbol:
    :code:`e_X`

Latex:
    :math:`e_{X}`

Dimension:
    :code:`dimensionless`


.. py:data:: change

    Change in the value of the quantity. See :attr:`~symplyphysics.symbols.basic.any_quantity`.

Symbol:
    :code:`Delta(X)`

Latex:
    :math:`\Delta X`

Dimension:
    :code:`any_dimension`


.. py:data:: initial_value

    Initial value of the quantity. See :attr:`~symplyphysics.symbols.basic.any_quantity`.

Symbol:
    :code:`X`

Latex:
    :math:`X`

Dimension:
    :code:`any_dimension`


.. py:data:: law

    :code:`e_X = Delta(X) / X`


    Latex:
        .. math::
            e_{X} = \frac{\Delta X}{X}