.
The condition says
(1 + 0.15)*x = 60, or
1.15x = 60,
where x is the unknown number under the question.
From the equation, x = .
Use your calculator.
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There is a bunch of lessons on percentage problems
- Percentage problems
- Percentage word problems (Type 1 problems, Finding the Part)
- Percentage word problems (Type 2 problems, Finding the Rate)
- Percentage word problems (Type 3 problems, Finding the Base)
- More complicated percentage problems
- Problems on percentage that lead to unexpected results
in this site.
They are written specially for you.
Read them and become an expert in this area.