Suppose A - D = E, that N= 16,000, E/A=.75, and N/E=.70. What is D/A?
E/A = 0.75
Replace E with A-D:
(A-D)/A = 0.75
Multiply both sides by A:
A-D = 0.75A
A - 0.75A = D
0.25A = D
D/A = 0.25
Replace E with A-D:
(A-D)/A = 0.75
Multiply both sides by A:
A-D = 0.75A
A - 0.75A = D
0.25A = D
D/A = 0.25