Can anyone please help make these sentences sound more natural (if necessary)? Many thanks! - The amount of added sugar in dark chocolate is less than that found in white chocolate. - Dark chocolate has less added sugar than white chocolate. - Organic oranges contain 30% more vitamin C than those grown conventionally. - Organic oranges have 30% more vitamin C than conventional ones. - Cars today are much more fuel-efficient than those manufactured in 1990. - Cars today are way more fuel-efficient than the ones from 1990. - The President's salary is 25 times higher than that earned by the average citizen. - The President's salary is 25 times higher than the average citizen's.