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Mathematics 20 Online
OpenStudy (anonymous):

in the 1969-1970 school year, the percent of high school graduates among 17- year-olds reached a maximum of 76.9%. this percent decreased by 5.5% in 1979-1980 and then increased by 2.8% in 1989-1990. what percent of 17 year olds graduated in 1990?

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