You can use the midpoint formulae as I have in the picture below
Is due today !! need help (show work/explanation)
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The text tells us 215 is 86% of the questions
We are looking for 100% of the questions
We get that number by:
Multiplying 100 and 215 and dividing it by 86
And that equals 250
We are looking for 100% of the questions
We get that number by:
Multiplying 100 and 215 and dividing it by 86
And that equals 250