pre_text: Cost of revenues. Cost of revenues increased by 20% to RMB59,659 million for the fourth quarter of 2019 on a year-on-year basis. The increase was mainly due to greater costs of FinTech services, channel costs and content costs. As a percentage of revenues, cost of revenues decreased to 56% for the fourth quarter of 2019 from 59% for the fourth quarter of 2018. The following table sets forth our cost of revenues by line of business for the fourth quarter of 2019 and the fourth quarter of 2018: Cost of revenues for VAS increased by 28% to RMB26,120 million for the fourth quarter of 2019 on a year-on-year basis. The increase mainly reflected greater channel costs for smart phone games due to increased revenues, including the channel costs attributable to Supercell, as well as higher content costs for services and products such as live broadcast services, online games and music streaming. Cost of revenues for FinTech and Business Services increased by 32% to RMB21,520 million for the fourth quarter of 2019 on a year-on-year basis. The increase was primarily driven by scale expansion of our payment-related services and cloud business. Cost of revenues for Online Advertising decreased by 14% to RMB9,241 million for the fourth quarter of 2019 on a year-on-year basis. The decrease was mainly due to lower content costs for video advertising as a result of fewer major content releases, and to cost management.
table: Unaudited
table: Three months ended
table: 31 December 2019 31 December 2018
table: % of % of
table: segment segment
table: Amount revenues Amount revenues
table: (Restated) (Restated)
table: (RMB in millions, unless specified)
table: VAS 26,120 50% 20,330 47%
table: FinTech and Business Services 21,520 72% 16,310 76%
table: Online Advertising 9,241 46% 10,800 63%
table: Others 2,778 84% 2,304 88%
table: Total cost of revenues 59,659 49,744
question: Analyse this data from a financial earnings document. What is the change in costs of FinTech and Business Services revenue between the fourth quarter of 2018 and 2019?