Jennifer's best long jump distance increased by `10%` from 1990 to 1991 and by 20% from 1991 to 1992. By what percent did her best long jumb distance increase from 1990 to 1992?

The price of a book went up from $20 to $25. By how many percent did the price increase?

The price of a commodity increased by 5% from 2010 to 2011, 8% from 2011 to 2012 and 77% from 2012 to 2013. What is the average price increase (approximate) from 2010 to 2013?

Glven here is a multiple bar diagram depicting the changes in the students strength of a college in four faculties from 1990-91 to 199293. Study the diagram and answer the questions. What was the percent in crease in Science students from the year 1990 - 91 to 1992-93 ?