Question

The rabbit population in a certain area is 200% of last years population there are 900 rabbits this year how many were there last year?

Answer 1

450 rabbits.

Explanation:

Answer 2

This year there are 900 rabbits which represents 200% of last year's population, means that last year the number of rabbits was:
x = 900 (100/200) = 450 rabbits.
The mathematical expression can be derived by a simple rule of three.
So, for last year the population was 450 rabbits.