Revenue from operations, however, declined marginally by 0.5% on year to Rs 10,419.41 crore. The mainstay transmission business saw a 0.5% drop in revenue to Rs 10,359 crore. The consultancy business reported a 13% growth in revenue to Rs 157 crore. The operating profit, calculated as earnings before interest, taxes, depreciation, and amortisation (EBITDA), rose nearly 4% on year to Rs 9,207.32 crore. Operating margin improved 363 basis points to 88.37%.