To calculate the % difference between two prices enter the values into the first and second fields then click on one of the Mode buttons. You can also use decimal or whole numbers in these fields. The result will give a percentage increase, decrease or difference between the two numbers according to the mode selected.
To show by how much the first price changes given a percentage value use the Percent form and click a button.
The Interest field gives the percentage change of the interest earned from a given capital that gets you the final balance of First Price. This is where the bank gives you interest in a dollar amount and the final balance after the interest is added. To determine what the interest is as a percentage enter the final balance in First Price field and the interest earned in the interest gained field.