document.write( "Question 137917: if 4/5 of a number is 16, what is 1/5 of the number? what is the number? \n" ); document.write( "
Algebra.Com's Answer #100788 by ptaylor(2198)\"\" \"About 
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Let x=the number
\n" ); document.write( "Then (4/5)x=16 divide each side by 4/5
\n" ); document.write( "x=16(5/4)=20
\n" ); document.write( "(Note: 16/(4/5): multiply numerator and denominator by 5/4. Since (5/4)/(5/4)=1, we haven't changed anything. This will get rid of the fraction in the denominator. So we have: (16(5/4))/((4/5)(5/4))=16(5/4)/1 or 16(5/4))\r
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\n" ); document.write( "\n" ); document.write( "1/5 of the number is (1/5)20=4
\n" ); document.write( "CK
\n" ); document.write( "4/5 of the number + 1/5 of the number = the number
\n" ); document.write( "16+4=20
\n" ); document.write( "20=20\r
\n" ); document.write( "\n" ); document.write( "Hope this helps---ptaylor
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