The percentage of high school seniors using alcohol decreased from 68.4% in 1975 to 52.4% now. Express this change in two ways: (1) as an absolute difference in terms of percentage points and (2) as a relative difference in terms of percent. (1) The percentage of high school seniors using alcohol decreased by (Round to the nearest tenth as needed.) percentage points. (2) The percentage of high school seniors using alcohol decreased by%. (Round to the nearest tenth as needed.)

the average annual cost of college at 4 year private college was $29,056 in the 2012-2013 academic year. this was a 4.2% increase from the previous year

The five-year survival rate for Caucasians for all forms of cancer increased from 39% in the 1960s to 59% now. Express this change in two ways: (1) as an absolute difference in terms of percentage points and (2) as a relative difference in terms of percent.

What is the overall percent increase (or decrease) after all three of the following changes are applied to a starting amount of $100? (1) A percent increase of 20%; (2) A percent decrease of 40% and; (3) A percent increase of 10%? Round to the nearest tenth of a percent. State whether it is a percent increase or a percent decrease.Show your work.

The U.S. Weather Bureau has a station on Mauna Loa in Hawaii that has measured carbon dioxide levels since 1959. At that time, there were 322 parts per million of carbon dioxide in the atmosphere. In 2005, the figure was 389 parts per million. What is the absolute change in carbon dioxide levels: parts per million % (Give your answer as a percent What is the relative change in carbon dioxide levels: between 0 and 100, not a decimal between 0 and 1. Round to ONE decimal place.)

For three consecutive years the tuition of an university increased by 15%, 11%, and 9%, respectively. What was the overall percentage increase of tuition during the three-year-period?

Computers depreciate very quickly because the technology is changing ao rapidly. If a certain computer sells for $799 one year and the next year it is only worth $575, what percent has it depreciated in one year? Round your answer to a WHOLE NUMBER and enter a PERCENTAGE.

Last year a professional basketball team won 60 games.  This year the team won 9 fewer games than it won last year.  What is the percent decreasee in the number of games the team won?

The number of measles cases decreased by 6% to 586 cases this year. What was the number of cases prior to the decrease?  Express your answer rounded correctly to the nearest whole number.

The number of students at a university increased from 5,000 students in 1974 to 9,000 in 2002. What was the percent increase in enrollment from 1974 to 2002?