To solve the given equation [tex] P=hr(1-d) [/tex]
By using the distributive property "a(b+c)=ab+ac"
[tex] P=hr-hrd [/tex]
[tex] hrd=hr-P [/tex]
[tex] d=\frac{hr-P}{hr} [/tex]
[tex] d=1-\frac{P}{hr} [/tex]
Therefore, [tex] d=1-\frac{P}{hr} [/tex] is the value of 'd'.
