im trying to create a ratio between 2 parts in a liquid. i have a pre mix of 80/20 for 80ml and want to add 20ml of the 20% part. what ratio will this leave me?

Question

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Answer 1

80 mls of 80 parts A and 20 part B is 64 ml A + 16 ml B.

If you then add 20 ml of B, you still have 64 mls A but now you have 36 ml B.

In the final solution (100 ml), you have 64 parts A and 36 parts B for a ratio of 64/36 = 16/9.

The original ratio was 4:1 (A:B) and this final ratio is 1.78:1 (A:B).