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Solving Proportions

Back to Algebra Help

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Solving Proportions

We use proportions to help us find the relationship between one thing and another.  If you know the relationship between one thing and another thing, say you have 15/20 on a test and you want to know what percentage (grade) you earned.  You know you've earned some amount out of 100.  Now enter the numbers in the blanks below.  a=15 b=20 and the 100 (the whole) goes in the D spot (the whole test was worth 20)  Hit calculate.  What was your score?

Enter the values from your proportion problem. Place an x in the box where the unknown goes..
A
C
   =  
B
D