I'm pretty sure it would be R-r/2
The question is asking for an **expression **that represents 'a number r **decreased **by the quotient of a number r and two', which can be written as 'r - (r / 2)'. This simplifies to 'r/2' or '0.5r', which indicates that the original number r has been halved. ;
The question involves creating an expression for 'a number r decreased by the quotient of a number r and two', which is expressed as r − 2 r . This simplifies to 2 r , indicating that the original number r is halved after the decrease. Therefore, the final expression representing the decrease is 2 r .
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