Using PERCENTOF With a Single Value The most straightforward use of the PERCENTOF function is to calculate the percentage of a single value against an overall total.

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How to Calculate Weight Loss Percentage To calculate weight loss percentage, divide the amount of weight lost by your starting weight, then multiply that by 100.

We want to calculate the percentage of annual decline. First, we divide the most current revenue number by the beginning revenue number: $10 million divided by $15 million comes to 0.667.