What is the measurement of a line?

Tcan be concluded that % of the seniors would prefer to see more candid pictures in this year's edition of the yearbook.

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

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 (%)