document.write( "Question 860107: The ratio of the prices of the keyboard and the monitor is 1 : 4. If the price of the monitor increases by 20% and the ratio decreases by 5%, what is the percentage increase/decrease in the price of the keyboard ? \n" ); document.write( "

Algebra.Com's Answer #518133 by josmiceli(19441) $\"\"$ $\"About$

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$\"+1%2F4+-+.05%2A%28+1%2F4+%29+=+%28+1+%2B+x+%29+%2F+%28+4+%2B+.2+%29+\"$
\n" ); document.write( " $\"+.95%2A%28+1%2F4%29+=+%28+1+%2B+x+%29+%2F+4.2+\"$
\n" ); document.write( " $\"+.95+=+%28+1+%2B+x+%29%2A%28+2%2F2.1+%29+\"$
\n" ); document.write( " $\"+1.995+=+2+%2B+2x+\"$
\n" ); document.write( " $\"+2x+=+-.005+\"$
\n" ); document.write( " $\"+x+=+-.0025+\"$
\n" ); document.write( "----------------
\n" ); document.write( "The new ratio is:
\n" ); document.write( " $\"+%28+1+%2B+x+%29+%2F+4.2+=+.9975+%2F+4.2+\"$
\n" ); document.write( "The % decrease in the price of the keyboard is:
\n" ); document.write( " $\"+.0025\"$ = .25%
\n" ); document.write( "-----------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+.95%2A%28+1%2F4%29+=+%28+1+%2B+x+%29+%2F+4.2+\"$
\n" ); document.write( " $\"+.95%2A%28+1%2F4%29+=+%28+1+-+.0025+%29+%2F+4.2+\"$
\n" ); document.write( " $\"+.95%2A.25+=+.9975+%2F+4.2+\"$
\n" ); document.write( " $\"+.9975+=+.95%2A.25%2A4.2+\"$
\n" ); document.write( " $\"+.9975+=+.9975+\"$
\n" ); document.write( "OK\r
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