Explanation:

As per the given data, we get

In the Dancers category, there are 20% females therefore, 80% must be males and hence the difference between them would be = (80 – 20)% of total dancers = 60% of 21% of total

Similary, 

In the CAs category, there are 60% females therefore, 40% must be males and hence the difference between them would be = (40 – 60)% of total CAs = – 20% of 18% of total

In the Artists category, there are 40% females therefore, 60% must be males and hence the difference between them would be = (60 – 40)% of total artists = 20% of 11% of total

In the Dentists category, there are 80% females therefore, 20% must be males and hence the difference between them would be = (20 – 80)% of total dentists = – 60% of 15% of total
In the Lawyers category, there are 40% females therefore, 60% must be males and hence the difference between them would be = (60 – 40)% of total lawyers = 20% of 19% of total
In the Designers category, there are 35% females therefore, 65% must be males and hence the difference between them would be = (65 – 35)% of total dancers = 30% of 16% of total
∴ The reqd. difference = (60% of 21% – 20% of 18% + 20% + 11% – 60% of 15% + 20% of 19% + 30% of 16%) of total