Table:
|  | 2019 | 2018 |
| --- | --- | --- |
| Developed technologies, at cost | $670.2 | $578.5 |
| Customer relationships, trade names, patents, and user lists, at cost (1) | 533.1 | 372.5 |
| Other intangible assets, at cost (2) | 1,203.3 | 951.0 |
| Less: accumulated amortization | (922.5) | (895.8) |
| Other intangible assets, net | $280.8 | $55.2 |
Paragraphs:
Other Intangible Assets, Net
Other intangible assets include developed technologies, customer relationships, trade names, patents, user lists and the related accumulated amortization. These assets are shown as “Developed technologies, net” and as part of “Other assets” in the Consolidated Balance Sheet. The majority of Autodesk’s other intangible assets are amortized to expense over the estimated economic life of the product, which ranges from two to ten years. Amortization expense for developed technologies, customer relationships, trade names, patents, and user lists was $33.5 million in fiscal 2019, $36.6 million in fiscal 2018 and $72.2 million in fiscal 2017.
Other intangible assets and related accumulated amortization at January 31 were as follows:
(1) Included in “Other assets” in the accompanying Consolidated Balance Sheets. (2) Includes the effects of foreign currency translation.
Question:
How much did developed technologies, at cost gain in 2019 over 2018?
Answer: (670.2 -578.5)/578.5  = 15.85