Is there a online/offline tool to convert the values of given numbers in proportion and in percentage?
<p>For example</p>

<p>There should be field for 2 values</p>

<p><strong>31 X 12</strong></p>

<p>now if change <strong>31</strong> to <strong>30</strong> then second field should change accordingly </p>

<p>and 2nd functionality should give values in <strong>%</strong></p>

<p>so if <strong>31 X 12</strong></p>

<p>and if put <strong>50%</strong> in another field and press submit it should give the <strong>50%</strong> of <strong>31 X 12</strong> > <strong>15.5 X 6</strong></p>

<p>I given above values just for example to explain. Actually values can be any number.</p>
