> Think of it as a ratio(+) not percentages so > Flour 100 parts, water 66 parts and so on > (+) because that is what it is It is! But it's a ratio to a sta

> Think of it as a ratio(+) not percentages so > Flour 100 parts, water 66 parts and so on > (+) because that is what it is It is! But it's a ratio to a standard 100 … and that's literally what a percentage is ("per centum" = "by the hundred").