I was hoping that answering “How did you decide how much of your income to give to charity?” is obviously one way of answering my original question, and so some people would answer that. But you may be right that it’s too ambiguous.
I was hoping that answering “How did you decide how much of your income to give to charity?” is obviously one way of answering my original question, and so some people would answer that. But you may be right that it’s too ambiguous.