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 328 parts per million of carbon dioxide in

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Question 1083566: 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 328 parts per million of carbon dioxide in the atmosphere. In 2017, the figure is 414 parts per million. Find the increase in carbon dioxide levels and the percent of increase, to the nearest tenth of a percent.
Increase carbon dioxide levels:_____ parts per million
Percent increase:______%
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So obviously I have 328ppm in 1959 and then this increased to 414ppm in 2017. However, do I just set this up as (414-328) divided by 414 and then times that by 100? Is that all I have to do?
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
No. Divide by 328. And then to the nearest tenth of a percent, 20.8 % INCREASE.