document.write( "Question 1053826: An old carpet which now costs 1000naira was sold for 1400naira when new, calculate the percentage decrease. \n" ); document.write( "

Algebra.Com's Answer #669077 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+x%2F100+\"$ = the percent decrease
\n" ); document.write( " $\"+1400+-+%28+x%2F100+%29%2A1400+=+1000+\"$
\n" ); document.write( " $\"+1400%2A%28+1+-+x%2F100+%29+=+1000+\"$
\n" ); document.write( " $\"+1+-+x%2F100+=+5%2F7+\"$
\n" ); document.write( " $\"+7%2F7+-+x%2F100+=+5%2F7+\"$
\n" ); document.write( " $\"+-x%2F100+=+-2%2F7+\"$
\n" ); document.write( " $\"+7x+=+200+\"$
\n" ); document.write( " $\"+x+=+28.571+\"$
\n" ); document.write( "-----------------
\n" ); document.write( "The percent decrease is 28.57 %
\n" ); document.write( "-----------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+1400+-+%28+28.571%2F100+%29%2A1400+=+1000+\"$
\n" ); document.write( " $\"+1400+-+.28571%2A1400+=+1000+\"$
\n" ); document.write( " $\"+1400+-+399.994+=+1000+\"$
\n" ); document.write( "Ok -error due to rounding off
\n" ); document.write( " \n" ); document.write( "

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