document.write( "Question 1023754: You have invested $250 on the stock market. And have a value rather of $280 after 6 months. What simple interest did your investment cash?( express your answer in percentage) \n" ); document.write( "
Algebra.Com's Answer #639271 by fractalier(6550)\"\" \"About 
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Your interest was $30 on a principal of $250.
\n" ); document.write( "The formula for simple interest is
\n" ); document.write( "I = Prt
\n" ); document.write( "Here we look for rate, r. So for a time of half a year,
\n" ); document.write( "r = I/(Pt) = $30/(250*.5) = 24% interest
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