The values of the square root of 10 and the square root of 15 are plotted on the number line what is the approximate difference in tenths between the square root of 10 and the square root of 15

Acompany 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. - how much did the stock level change? in (%)