document.write( "Question 934686: y varies inversely with x. If x decreases by 20%, find the percentage change in y.
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Algebra.Com's Answer #567768 by TimothyLamb(4379)\"\" \"About 
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original relation:
\n" ); document.write( "y = 1/x
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\n" ); document.write( "new relation (x decreases by 20%):
\n" ); document.write( "y/0.80 = 1/0.80x
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\n" ); document.write( "percentage change in y:
\n" ); document.write( "( y/0.80) / y * 100
\n" ); document.write( "( 1/0.80) * 100
\n" ); document.write( "125%
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\n" ); document.write( "answer:
\n" ); document.write( "y increases by 25%
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