Question

if n% of n=81, then n=?

Answer 1

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Answer 2

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$\\ \\ \frac{n}{100} × n = 81 \\ \\ \frac{ {n}^{2} }{100} = 81 \\ \\ { (\frac{n}{10} )}^{2} = {9}^{2} \\ \\ \frac{n}{10} = 9 \\ \\ n = 90$