Question

the gestation period of rhinos (487 days) is what percent longer than the gestation period of dogs (65days).

Answer 1

percent change = ((new value) - (reference value))/(reference value) × 100%

... = (487 -65)/65 × 100%

... = 422/65 × 100%

... = 6.492 × 100%

... ≈ 649%

The gestation period of rhinos is 649% longer than the gestation period of dogs.