It is RATIOnal, because it can be writtenwhich is the RATIO of two integers. It's not a whole number because the whole numbers are 0,1,2,3,4,... and they are never negative. It is not a natural number because the natural numbers are 1,2,3,4,5,... It is an integer. The integers are ...,-5,-4,-3,-2,-1,0,1,2,3,4,5,... Edwin