What is 14% of 8.5? Round to the nearest hundredth (if necessary).

Ineed me i stuck and i don’t want to get it wrong

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 (%)

Ineed with this problem 21 show steps