So, how much fruit am I getting?

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454 grams in a pound (grams are a measure of weight), 450 millilitres in this bottle of "fruit smoothie"  (millilitres are a measure of volume), and one millilitre of water weighs one gram.

By extension, the contents of this 450 millilitre bottle of "fruit smoothie" should weigh roughly 450 grams or just under one pound.

So, if one pound (454 grams) of fruit goes into each bottle, and the bottle's contents weigh roughly 450 grams how much of the contents of the bottle are fruit?

In reality we have no weigh of telling. By law the labels on food packaging need to list the ingredients in declining order of weight, but they do not need to indicate the percentage of each ingredient. (Presumably so that competitors can't reverse engineer the recipes.)

One pound of fruit is used to prepare this bottle of fruit smoothie, but we can't tell how much actually makes it into the bottle.