Complex sentence: As for sanitation, only 28.953% of the total population have access to "improved" sanitation, 32.800% of the urban population and 25.434% of the rural population.
Split into simpler sentences: As for sanitation, only 28.953% of the total population had access to "improved" sanitation. This was 32.800% of the urban population and 25.434% of the rural population.