The definition of a formula of efficiency is the ratio of the desired output to the total input. It is a measure of how well a system or process is performing, and is calculated by dividing the total output by the total input. Efficiency is a measure of how much work is done with the least amount of effort. It is important to note that efficiency is not the same as effectiveness, which is the measure of how well a system or process is achieving its goals. Efficiency is a measure of how well a system or process is using its resources to achieve its goals. Efficiency can be improved by increasing the amount of output or reducing the amount of input. This can be done by increasing the efficiency of the system or process, or by reducing the amount of resources used. By improving the efficiency of a system or process, it can be more cost-effective and efficient in achieving its goals.