ר
, , .
, , .
- . - .
.
" " .
- , , , - .
( ) .
:
40:60, 30:70 50:50 %.
40:60 %:
() = () * 100/40
() = () * 100/60
, , .
( ) = ( - ) / ( - )
- " "
( )
()
ר
, ,
/
()
/
ר
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