A man buys an article for …15

A man buys an article for $10. and sells it for $15. Find the gain percent?

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 #8500

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