, thus sales also decrease in line with the fuel material cost of natural gas. 3 Q1-2021 Q1-2020 THB Mn THB Mn THB Mn % Revenue from construction under a concession arrangment - 131.3 (131.3) N.A. (
102.3 103.2 102.9 102.0 (0.9) (0.9) 410.4 417.0 (6.6) (1.6) Revenue from construction under a concession arrangment - 68.5 21.2 14.9 (6.3) (29.7) 104.6 - 104.6 100.0 Change QoQ Change YoY Q1-2019 Q2-2019
Mn % Revenue from construction under a concession arrangment 131.3 - 131.3 N.A. (>100) Change The group has revenue from construction under a concession arrangement for the first quarter of 2020