# How to calculate a quality indicator?

**Sommaire de notre article**

### How to calculate a quality indicator?

For **calculate** the efficiency rate, ie the rate of objectives achieved, is quite simple. You take the number of objectives defined on all of your processes and you count how many of them have been achieved.

### How to calculate the percentage of the objective?

**Percentage** (%) = 100 x Partial value / Total value If the partial value is greater than the total value (superset), then the **percentage** will be greater than 100%.

### How to calculate a percentage change?

Here’s how to calculate a percentage change (or “rate of change”). To calculate a y% increase, the following formula is used: Base sum x (1 + y /100) Note: “( 1 + y /100)” is called the Multiplier Coefficient. Example of increase calculation: The Dog of War video game costs 35 euros. Its price increases by 12%.

### How to calculate percentages?

Thanks to these techniques, it is possible to calculate slightly more complex percentages: 4% of a value is equivalent to 4 x 1% of it. 15% of a value = 10% of that value plus 5% of the initial value.

### How to calculate a percentage decrease?

The calculation of a reduction percentage is very useful on a daily basis, for example for calculating a discount during sales. To calculate a decrease of y%, the following formula is used: Base sum x (1 – y /100) Note: “(1 – y /100)” is called the Multiplier Coefficient.

### How to calculate the numerical value of a percentage?

To calculate the numerical value of a percentage, multiply the total value by the percentage / 100. In other words: Example of calculating the numerical value of a percentage: In a college of 400 students (total value), 28% ( percentage) of students are in 3e. How many students from this college are in 3rd grade?