Question 189511
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Let <i>r</i> be the decimal fraction increase from 25 to 36.  What this means is that you are going to take some percentage of 25, add that to 25 and have a result of 36, like this:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \  25 + 25r = 36]


Add -25 to both sides of the equation:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \  25r = 11]


Multiply both sides by *[tex \Large \frac{1}{25}]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \  r = \frac{11}{25} = 0.44]


He said confidently after performing the division on the calculator.


Now, to get from a decimal fraction to a percentage, you just move the decimal point two places to the left.


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 0.44 = 44%]


John
*[tex \LARGE e^{i\pi} + 1 = 0]
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