document.write( "Question 412423: 54 pupils, 2/3 of them owned space hoppers. 1/4 of those used them to bounce to shops, 1/3 used them to bounce to see their friends and 2/9 only bounced them when their relatives visited, the rest has used them once only, how many pupils has used them once? \n" ); document.write( "

Algebra.Com's Answer #289691 by josmiceli(19441) $\"\"$ $\"About$

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The fraction of 54 pupils that didn't use them once is:
\n" ); document.write( " $\"%282%2F3%29%2A%281%2F4+%2B+1%2F3+%2B+2%2F9%29\"$
\n" ); document.write( " $\"4%2A9+=+36\"$ is the LCD and nothing smaller will work
\n" ); document.write( " $\"%282%2F3%29%2A%289%2F36+%2B+12%2F36+%2B+4%2F36%29\"$
\n" ); document.write( " $\"%282%2F3%29%2A%2825%2F36%29\"$
\n" ); document.write( " $\"50%2F108+=+25%2F54\"$
\n" ); document.write( "This is the fraction of 54 pupils who DID NOT use it just once,
\n" ); document.write( "so the fraction who used it only once is:
\n" ); document.write( " $\"1+-+25%2F54+=+54%2F54+-+25%2F54\"$
\n" ); document.write( " $\"54%2F54+-+25%2F54+=+29%2F54\"$
\n" ); document.write( "The number of pupils who used them only once is $\"54%2A%2829%2F54%29+=+29\"$ \r
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