Simplify the following text for a Grade 10 native English-speaking person.
Original: Hilo is the second-largest CDP in the State of Hawaii and the largest settlement on the island of Hawaii with a population of 40,759 during the 2000 census and 47,345 according to a 2007 estimate .
Simplified: Hilo is the second-largest CDP in the State of Hawaii and the largest settlement on the island of Hawaii with a population of 40,759 during the 2000 census .