Answer:
16667 gorillas
Step-by-step explanation:
Let x = number of gorillas 10 years ago
The number fell by 70%, which means there are 100 -70 = 30 % left
x*.30 = 5000
Divide each side by .3
x = 5000/.3
x =16666.666666
Rounding to the nearest gorilla
9514 1404 393
16,700
5000 is 30% of the original number, so ...
5000 = 0.30 × original
5000/0.30 = original ≈ 16,667
The original number was about 16,700.
