A shopkeeper sold 10articles at the cost price of 8 articles

A shopkeeper sold 10articles at the cost price of 8 articles. Then find the profit% or lost% ?

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

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #7157

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