Percentages are used to express a part of a whole as a fraction of 100. Think of it like a big pizza that's divided into 100 slices - if you eat 25 of them, you've eaten 25% of the pizza! It's a great way to compare things and understand how they relate to each other.
For example, if you're trying to save money and you've managed to stash away 30% of your income, that's a big deal! You can use percentages to track your progress and stay motivated. And, let's be real, who doesn't love a good percentage-based goal?