This year, a farmer planted 400,000 corn stalks. last year, the farmer planted 276,650 corn stalks. how many more corn stalks did the farmer plant this year then last year.

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 (%)