Perform the required calculations for each of the following items. Round your answers to the nearest 0.1%.
Perform the required calculations for each of the following items. Round your answers to the nearest 0.1%.

25. A class had 30 pupils at the beginning of this school term, but now has 5 more pupils. What is the percent of increase?

26. Eggs were $2.05 per dozen on January 1 and $2.00 per dozen on February 1. What percent did the price decrease during January?

27. During November the price of each share of a certain stock declined from $196 to $132. What was the rate of decline for that month?

28. By careful reorganization, a company was able to reduce the cost of operation from $21,840 per month to $17,190 per month. By what percent was the cost of operation reduced?

29. The circulation of a city library for September was 157,928 books; for October, 184,211 books. What was the percent of gain for October over September?