document.write( "Question 114485: ‘n’ litres of oil was poured into a tank and it was still e% empty. How much oil must be poured into the tank in order to fill it to the brim.
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Algebra.Com's Answer #83302 by stanbon(75887)\"\" \"About 
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‘n’ litres of oil was poured into a tank and it was still e% empty. How much oil must be poured into the tank in order to fill it to the brim.
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\n" ); document.write( "The n litres occupies (100-e)% of the tank.
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\n" ); document.write( "Proportion:
\n" ); document.write( "Let x litres be the capacity of the tank
\n" ); document.write( "n/(100-e)% = x/100%
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\n" ); document.write( "x = n/(100-e)%
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\n" ); document.write( "The tank already has n litres in it.
\n" ); document.write( "You need [n/(100-e)%]-n = [100n/(100-e)]-n
\n" ); document.write( "= [100n-n(100-e)]/(100-e)
\n" ); document.write( "= ne/(100-e) litres to fill the tank
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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