Calculating efficiency is a way to measure how well a system, process, or machine is performing. It is a measure of how much work is done compared to the amount of energy or resources used. Efficiency is usually expressed as a percentage, with 100% being the most efficient. Efficiency can be calculated in a variety of ways, depending on the system or process being evaluated. For example, when measuring the efficiency of a machine, one might look at the amount of energy used to produce a certain amount of output. In a system, one might look at the amount of time it takes to complete a task or the amount of resources used to complete a task. Calculating efficiency is important because it helps to identify areas of improvement and can help to identify areas where resources are being wasted. By improving efficiency, organizations can save money, increase productivity, and improve customer satisfaction.