A farmer applied NPK 15:11:8 at planting. What is the percentage of potassium in the fertilizer?

To find out the percentage of potassium in the fertilizer, we need to understand what NPK means. NPK stands for Nitrogen, Phosphorus, and Potassium, which are the three most important nutrients required for plant growth. In this case, the fertilizer has an NPK ratio of 15:11:8, which means it contains 15% nitrogen, 11% phosphorus, and 8% potassium. To find out the percentage of potassium in the fertilizer, we need to divide the amount of potassium by the total amount of NPK and then multiply by 100 to convert it to a percentage. Therefore, the percentage of potassium in the fertilizer is (8 / 34) x 100 = 23.53%. Therefore, the correct option is: 23.53%