Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:
Explain the following concept in less than five sentences.

### Input:
The ‘80-20 rule’

### Response:
The '80-20 rule' states that 80% of outputs or outcomes come from 20% of inputs or efforts. This rule applies to a variety of situations, such as the amount of time a person spends on a task and the proportion of customer revenue to total revenue. This rule can be used to help identify which efforts are the most efficient and yield the most outputs.