Let x be a positive real number and let d be a positive integer. Prove that the number of positive integers less than or equal to x that are divisible by d is [x/d].
I am having trouble with this one. If anyone could help that would be terrific!
But is the number of whole (integer) times that d "fits" into x, meaning: are all multiples of d less than or equal x, and every multiple of d less than or equal x must be one of these (why?), so...