Answer:
• let the number be x
[tex]{ \tt{10\% \: of \: x = 86}} \\ \\ { \tt{ \frac{10}{100} \times x = 86}} \\ \\ { \tt{10x = 86 \times 100}} \\ \\ { \tt{10x = 8600}} \\ \\ { \boxed{ \tt{ \: x = 860 \: }}}[/tex]
Answer: The number is 860.