People can more or less handle even percentages: full circle = 100%, half a circle = 50%, a quarter = 25%, and three-thirds = 75%. But what if a circle ends somewhere between the “half” and “three-thirds” — like the green one on the picture? How quickly can you calculate 50 + 25 ÷ 2 and assume it should be around 62.5%?If you have only one circle, you can put a percentage number in the middle, but what if the widget contains three circles?
Source: 7 Deadly Sins of Data Visualization | by Slava Shestopalov | Aug, 2020 | Muzli – Design Inspiration