document.write( "Question 1047683: the number 40 is 80% of what number \n" ); document.write( "

Algebra.Com's Answer #663224 by ikleyn(52788) $\"\"$ $\"About$

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\n" ); document.write( "Answer. 50.\r
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document.write( "80% of the unknown number \"x\" is 0.8*x.\r\n" );
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document.write( "So, 0.8x = 40,  x =  = 50.\r\n" );
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\n" ); document.write( "\n" ); document.write( "There is a bunch of lessons on percentage problems in this site:\r
\n" ); document.write( "\n" ); document.write( "    - Percentage problems\r
\n" ); document.write( "\n" ); document.write( "    - Percentage word problems (Type 1 problems, Finding the Part)\r
\n" ); document.write( "\n" ); document.write( "    - Percentage word problems (Type 2 problems, Finding the Rate)\r
\n" ); document.write( "\n" ); document.write( "    - Percentage word problems (Type 3 problems, Finding the Base)\r
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