Question 67683
C cats equals D dollars;  divide both sides by C

1 Cat equals (D/C) dollars

We are told that 1 parrot costs (7/4)(D/C)=(7D)/(4C) dollars

1 parrot equals (7D)/(4C);  multiply both sides by P

P parrots equals (7PD)/(4C)  dollars


Hope this helps-----ptaylor