subject
Mathematics, 01.02.2021 17:10 keagank

From 1999 to 2000, the number of days of unhealthy air quality in Charlotte, North Carolina, dropped from 5 to 2. Find the percent of decrease in the number of days of unhealthy air. A.
15%

B.
6%

C.
1.5%

D.
60%

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Answers: 2

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