To find the percentage of a number you should look at the whole equal to 100 percent. In mathematics a percentage is a number or ratio expressed as a fraction whose denominator bottom is 100. For this example the formula you would use is A1 1-B1.
First click into cell D2 so the percentage shows up in the Percentage column.
After cross multiplying we get. Therefore 25 of 240 is 60. To calculate percent change between values A and B use the following formula. Your proportion will like this.