If Anna bakes 12 blueberry muffins 20 bran and 8 apple what percentage of the are blueberry?

To calculate the percentage of blueberry muffins, you first need to find the total number of muffins:

Total muffins = Blueberry muffins + Bran muffins + Apple muffins

Total muffins = 12 + 20 + 8 = 40

Next, you calculate the percentage of blueberry muffins by dividing the number of blueberry muffins by the total number of muffins and then multiplying by 100:

Percentage of blueberry muffins = (Blueberry muffins / Total muffins) * 100

Percentage of blueberry muffins = (12 / 40) * 100 = 30%

Therefore, the blueberry muffins make up 30% of the total number of muffins baked by Anna.