Percentage of All 2% of children in PA have a developmental disability. Of these, 40% live below the poverty line. In comparison, only 35% of children without a developmental disability live below the poverty line. What percentage of ALL children in PA live below the poverty line? I think I am overthinking it?

$0.02 * .4 = .008 = $0.8% of the the children are dev. disability and below poverty line.

$0.98*.35 = .343 =$ 34.3% of the children are not dev. disability and below the poverty line.

So 34.3% + .8% = 35.1% of the children are below the poverty line and may or may not have dev. disability