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48 = 300


If it takes 1 minute to grade 48 then it will take "x" amount of minutes to grade 300. The first fraction has to equal the second fraction when they are cross multiplied together. 1 times 300 has to equal 48x. Divide both by 48 and you will get x = 6.25 minutes (6 and a quarter minutes) which equates to six minutes 15 seconds.

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Q: A grading machine can grade 48 multiple-choice tests in 1 minute how long will it take the machine to grade 300 test how would you set that up as a proportion?
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