Mary replaced 20% of an 60% juice concentrate with water

Mary replaced 20% of an 60% juice concentrate with water. Upon finding the resultant juice too sweet, she further replaced 30% of this solution with water, then fine tuned it by replacing 10% of that solution with water. What is the final juice concentration Mary liked best?

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #69627