• Singapore Telecommunications average operating margin for 2019 was 14.05%, a 33.13% increase from 2018.
• Singapore Telecommunications average operating margin for 2018 was 21.01%, a 4.15% decline from 2017.
• Singapore Telecommunications average operating margin for 2017 was 21.92%, a 32.93% decline from 2016.

Operating margin can be defined as operating margin measurement of what proportion of a company's revenue is left over after paying for variable costs of production such as wages, raw materials, etc.