During a certain week, a seal ate 50% of the first 80…

During a certain week, a seal ate 50% of the first 80 smelt it came across, and 20% of the remaining smelt it came across. If the seal ate 40% of the smelt it came across during the entire week, how many smelt did it eat?

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 #59930