A student multiplied a number by 3/5 instead of 5/3

A student multiplied a number by 3/5 instead of 5/3. What is the percentage error in the calculation?

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 #10536

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