How many liters of water must be evaporated from 50 liters of…

How many liters of water must be evaporated from 50 liters of a 4 percent sugar solution to get a 5 percent sugar solution?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #2422