document.write( "Question 1164217: There are 1580 adults and children on a ship. 60% of them are adults.when the ship stops at the harbour, some of the adults alight and the percentage of the adults remaining on the ship decreases to 20%. How many adults alight from the ship......?? \n" ); document.write( "

Algebra.Com's Answer #788528 by MathTherapy(10552) $\"\"$ $\"About$

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There are 1580 adults and children on a ship. 60% of them are adults.when the ship stops at the harbour, some of the adults alight and the percentage of the adults remaining on the ship decreases to 20%. How many adults alight from the ship......??
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With 60% of the 1,580 individuals on board being adults, we get .6(1,580) = 948 adults\r
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document.write( "Let number of adults that alit be A
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document.write( "Then the number of adults that remained = 948 - A, and the remaining individuals on board = 1,580 - A
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document.write( "We then get: 
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document.write( "          .2(1,580 - A) = 948 - A ------- Cross-multiplying
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document.write( "              316 - .2A = 948 - A
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document.write( "              - .2A + A = 948 - 316
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document.write( "                    .8A = 632
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document.write( "Number of adults that alit, or  \n" );
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