Enter the total number of rejections and the total number of units into the calculator to determine the rejection percentage.

## Rejection Percentage Formula

The following formula is used to calculate a rejection percentage.

R% = TR / TU * 100

• Where R% is the rejection percentage
• TR is the total number of rejects
• TU is the total number of units

To calculate rejection percentage, divide the total number of rejects by the number of units in the lot, then multiply by 100.

## What is a rejection percentage?

Definition:

A rejection percentage is a measure of the rate at which products are rejected on average. This rate is expressed as a ratio of rejects to sample size.

## How to calculate rejection percentage?

Example Problem:

The following example problem outlines the steps and information required to calculate a rejection percentage.

First, determine the number of units in the sample size. In this example, we are looking at a sample of 4000 parts.

Next, determine the total number of rejects in the sample. In this case, there are 100 rejects.

Finally, calculate the rejection percentage using the formula above:

R% = TR / TU * 100

R% = 100/4000 * 100

R% = 2.5 %