Simplify the following text for a Grade 5 native English-speaking person.
Original: Mount Everest , or Mount Chomolungma , is the world 's highest mountain above the mean sea level at 8848 m. It is located in the Himalayas on the Nepal ( Sagarmatha Zone ) - China ( Tibet ) border .
Simplified: The Mount Everest is the largest and highest mountain in the world . Mount Everest is in the Himalayas .