Here are a few others that should be learned:--
6-1/4% = 1/16 of 100% 16-2/3% = 1/6 of 100%
8-1/2% = 1/12 of 100% 33-1/3% = 1/3 of 100%
12-1/2% = 1/ 8 of 100% 66-2/3% = 2/3 of 100%
The Circle of Knowledge: A Classified, Simplified, Visualized Book of Answers · 第 1283 / 1638 题