the 80/20 rule // (also the 80/20 principle) noun [sing.]
a theory that 80% of results come from 20% of effort or causes:
According to the 80/20 rule, 80% of your revenue comes from just 20% of your customers.
The 80/20 rule reminds you to focus 80% of your time and energy on the 20% of your work that's important.
SYN PARETO'S LAW
