• Norsk Hydro average gross margin for 2023 was 38.03%, a 7.92% decline from 2022.
• Norsk Hydro average gross margin for 2022 was 41.3%, a 1.88% decline from 2021.
• Norsk Hydro average gross margin for 2021 was 42.09%, a 7.56% decline from 2020.

Gross margin can be defined as a company's total sales revenue minus its cost of goods sold, divided by the total sales revenue, expressed as a percentage.