pre_text: AMERICAN TOWER CORPORATION AND SUBSIDIARIES
  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
  (Tabular amounts in millions, unless otherwise disclosed) 2. PREPAID AND OTHER CURRENT ASSETS Prepaid and other current assets consisted of the following: The reduction in Prepaid operating ground leases is a result of the reclassification of assets to the Right-of-use asset in connection with the Company’s adoption of the new lease accounting standard.
table: As of December 31, 2019 As of December 31, 2018
table: Unbilled receivables $142.3 $126.1
table: Prepaid income tax 185.8 125.1
table: Value added tax and other consumption tax receivables 71.3 86.3
table: Prepaid assets 56.8 40.5
table: Prepaid operating ground leases — 165.0
table: Other miscellaneous current assets 57.4 78.2
table: Prepaid and other current assets $513.6 $621.2
question: Analyse this data from a financial earnings document. What was the change in prepaid assets between 2018 and 2019?