# Unknown number

I think the number. I'll reduce it to its one-third. The result is then increased by one-third, and I get the number 12.

**Your answer:**Tips to related online calculators

Need help to calculate sum, simplify or multiply fractions? Try our fraction calculator.

Do you have a linear equation or system of equations and looking for its solution? Or do you have a quadratic equation?

Do you have a linear equation or system of equations and looking for its solution? Or do you have a quadratic equation?