Show the calculation of Return on capital employed (ROCE) and interpret.

Total Assets Total Liabilities 2015 2016 2017 448,642 442,657 444,792 393,096 382,731 380,516 2018 2019 2020 452,177 507,264 599,446 386,508 437,476 519,231 Total Operating Expenses 8,256 9,175 8,392 8,082 7,751 8,448 ROCE (%) = = Operating profit Capital employed x 100 Total Assets Total Liabilities 2015 2016 2017 448,642 442,657 444,792 393,096 382,731 380,516 2018 2019 2020 452,177 507,264 599,446 386,508 437,476 519,231 Total Operating Expenses 8,256 9,175 8,392 8,082 7,751 8,448 ROCE (%) = = Operating profit Capital employed x 100