I think you're misreading my comment. When I said "%" distinguishes proportions from quantities, I was implying there'd be both proportions and quantities (as h

I think you're misreading my comment. When I said "%" distinguishes proportions from quantities, I was implying there'd be both proportions and quantities (as his version has). Otherwise, they needn't be distinguished. When I said I found his version clearer, I meant between the two versions originally given. The one you've just added is of course less clear because unlike the other two, it doesn't point out the issue. BTW: But maybe it is clearer, for calculation rather than understanding, because I get 27.(27)%, not 26%... https://www.google.com/search?q=%28.9*.04%29/%28.9*.04%2B.1*.96%29= https://www.google.com/search?q=%28.9*.04%29/%28.9*.04%2B.1*...