SOLUTION: 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 305 parts per million of carbon dioxide in

Question 1138298: 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 305 parts per million of carbon dioxide in the atmosphere. In 2005, the figure was 381 parts per million. Find the increase in carbon dioxide levels and the percent of increase. Round to the nearest tenth of a percent.
Increase carbon dioxide levels: 76
Percent increase: ?

Answer by ikleyn(52773) (Show Source): You can put this solution on YOUR website!
.


You correctly determined increase of the CO2 level : it is 76 parts per million.


To determine the percent of increase, you should relate this increase of 76 to the base level of 305 and then multiply 
this ratio by 100 to get the percentage:


    The percent of increase =  =  = 24.92%.

Solved.

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