Which unit is best for the volume of
a shoe box?
Вас

The correct answer is 15%.

Explanation:

In a bag of fertilizer, the letters NPK is written, which signifies nitrogen content, phosphorus content, and potassium content in sequential order. These are the three nutrients that form a complete fertilizer. The content of the nutrients is denoted by numbers, which is followed by a percentage symbol as these numbers signify the percentage of the nutrient in the formation of the fertilizer. Thus, 30-15-10 shows that the given fertilizer comprises 30 percent nitrogen, 15 percent phosphorus, and 10 percent potassium.