Concept of Percent
Understanding how to express parts of a whole using the base of 100
1. What is Percent?
Definition:
Percent means "per hundred" or "out of one hundred."
The word comes from the Latin "per centum" which literally means "by the hundred."
Key Facts:
- 1% = one hundredth = 1/100 = 0.01
- Percent is a way to express parts of a whole based on 100
- It helps us compare different quantities easily
Try It Yourself: Paint the Grid!
Click or drag to paint cells. Right-click and drag to unpaint.
0 out of 100 = 0%
Interactive 10×10 grid: each small square represents 1%. Currently, 0 blue squares out of 100 = 0%.
Try painting exactly 25 squares to see what \( \frac{1}{4} \) looks like!
2. The Percent Symbol (%)
%
The Percent Symbol
| Written | Read As | Meaning |
|---|---|---|
| 25% | "twenty-five percent" | 25 out of 100 |
| 50% | "fifty percent" | 50 out of 100 (half) |
| 100% | "one hundred percent" | The whole quantity |
| 7% | "seven percent" | 7 out of 100 |