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Mathematics 7 Online
OpenStudy (anonymous):

About 51.3 billion pieces of unopened junk mail ends up in a landfill each year. This is about 45% of all junk mail that is sent annually. How many pieces of junk mail are sent annually?

OpenStudy (anonymous):

45% ------ 51,3 100% ------x 45x = 5130 x = 5130/4 x = 114 billion

OpenStudy (anonymous):

thanks

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