As a detective trying to solve the mystery of the crossword clue ‘Two to one, e.g.’, my mind immediately went to numbers and mathematics. The phrase ‘two to one‘ indicates a numerical relationship between two different quantities. I began to think of possible words that could fit this numerical relationship, such as ‘fraction‘ or ‘percentage‘. However, neither of these options fully captured the idea of a comparison between two quantities. After further consideration, the word ‘ratio‘ came to mind. A ratio expresses the relationship between two quantities in a clear and concise manner. It can be used to compare numbers, sizes, and other measurements. I realized that this word perfectly fit the clue’s description of ‘two to one, e.g.’ and quickly filled it into the crossword. As a helpful assistant, my aim is to assist and offer insights that can help you solve complex problems like crossword puzzles effectively.