Adding a percentage to a Price

The formula to add 30% would like this:

A1 * (1 + 0.30)

Where:

• A1 is the cell containing the value to increase, 25.00 in your example;
• “0.30” is 30% (or 30/100.)

Some thoughts to help on problems like this:

1. Percentages are usually (if not always) "of" some value. In this case it is "30% of $25.00".
2. The word "of" in this context means to multiply
3. 30% is 30/100 = 0.30. Numbers will interpret 30% as 0.30 in a formula.

So the answer is $25.00 + (30%*25.00) = $25.00 * (1 + 0.30)