Percentages are all around us, from store discounts to sales tax. While calculators are handy, knowing how to estimate these values mentally is a powerful time-saver.
Hack 1: The Commutative Property (x% of y = y% of x)
Need to calculate 8% of 50? That sounds tricky. But flip it: what is 50% of 8? It is 4. The answers are identical! Reversibility makes percentage calculations incredibly simple.
