Let x represent the percentage change. The percentage change is a factor that the original number is multiplied to get the new number.
60*x = 35
x = 35/65 = 0.53846 = 53.846%
The answer is D., a dummod deleted my answer that has alot of thanks and ratings.
If your talking about the graph with x and y. The section that has a higher amount in total would be y. Apologies, if I confused myself on your question.
This is a second-order ODE since the highest order derivative is 2 (from

).
It's not linear because it doesn't take the form

and it's not possible to rewrite it as such.
The Kangaroo Rat and the common tree shrew is familiar because the kangaroo rat and the tree shrew have the same class: Mammalia, same phylum: Chordata, and the same kingdom : Animalia. They both are identical because they are small look like small rats etc.