Math Problem Statement
A company that manufactures and sells guitars made changes in their product range. From the start they had 20 models. Then they reduced the number of models to 15. As a result, the company enjoyed a 10% increase in turnover.
a. How much did the stock level change?
Solution
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Math Problem Analysis
Mathematical Concepts
Arithmetic
Percentage Change
Formulas
Percentage change formula: ((New Value - Old Value) / Old Value) * 100
Theorems
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Suitable Grade Level
Grades 7-9
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