Complex sentence: There are about 15 million disabled people in Bangladesh, with the number rising by about quarter million each year, according to a survey done by WHO in 1985, about the same rate being faced by many countries, both large and small, across the world.
Split into simpler sentences: There are about 15 million disabled people in Bangladesh, with the number rising by about quarter million each year, this survey was done by WHO in 1985. About the same rate being faced by many countries, both large and small, across the world.