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A mobile phone manufacturing plant is producing too many phones that do not work. The quality assurance team is investigating.
Production shows that only 3 of the first 10 phones are working, which is 30% of the phones. Describe how the percentage of working phones changes if the eleventh and twelfth phones work correctly.

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jlemmy
since there are now 4/12 phones working it would be 33.33% because 4/12 is = to 1/3
If the eleventh phone is working correctly, the percentage increases to:4/11=36.4%
If the eleventh and twelfth phones are working, the percent increases to:5/12=41.7%

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