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