since Norma sold 24 of the peanut butter squares that she baked and it is 80% of it. There is only 20% of the peanut butter squares she has baked. Leaving it to be only 6 peanut butter squares left.
This is because 24 is the 80% of 30. She had 30 in total and sold that 80% which is 24. So, therefore it leaves 6 peanut butter squares left. Making it 20% of what Norma baked.
