Question

if humans originated form apes then why does apes still exist?

Answer 1

Humans did not evolve from present-day apes. Rather, humans and apes share a common ancestor that gave rise to both. This common ancestor, although not identical to modern apes, was almost certainly more apelike than humanlike in appearance and behavior. At some point -- scientists estimate that between 5 and 8 million years ago -- this species diverged into two distinct lineages, one of which were the hominids, or humanlike species, and the other ultimately evolved into the African great ape species living today.
Hope it helps. ...

Answer 2

Humans are not originated from apes. Actually, apes and humans have a common ancestor CHLCA, i.e. they have evoluted from the same ancestor.
So, yes, humans and apes are related, but only due to their common ancestors.

Millions of years ago, the our ancestors divided into apes and humans. Hence, both of them are different with some shared characteristics.

I hope it helps :)