20/100 = 20%
A value of 20% shows up in everyday life as a sale discount, a phone battery level, or the chance of rain in a weather forecast. For example, a store might take 20% off a shirt, or a forecast might say there is a 20% chance of showers.
A quick way to picture 20% is as one out of five equal parts. Imagine splitting a pizza into five equal slices: one slice is about 20% of the whole pizza.
One common mistake is treating a 20% discount as the same thing as paying 20% of the original price. With a discount, you take 20% off, so you still pay the remaining 80%.
