pre_text: Selling, General and Administrative Expense NM—Not meaningful Total selling, general and administrative (SG&A) expense increased 6.4 percent in 2019 versus 2018, driven primarily by the following factors: • Higher spending (5 points) driven by Red Hat spending (5 points); and • Higher acquisition-related charges and amortization of acquired intangible assets associated with the Red Hat acquisition (3 points); partially offset by • The effects of currency (2 points). Operating (non-GAAP) expense increased 3.4 percent year to year primarily driven by the same factors excluding the acquisition-related charges and amortization of acquired intangible assets associated with the Red Hat transaction.
table: ($ in millions)
table: For the year ended December 31: 2019 2018 Yr.-to-Yr. Percent Change
table: Selling, general and administrative expense
table: Selling, general and administrative—other $17,099 $16,438 4.0%
table: Advertising and promotional expense 1,647 1,466 12.3
table: Workforce rebalancing charges 555 598 (7.2)
table: Amortization of acquired intangible assets 762 435 74.9
table: Stock-based compensation 453 361 25.2
table: Bad debt expense 89 67 32.5
table: Total consolidated selling, general and administrative expense $20,604 $19,366 6.4%
table: Non-operating adjustments
table: Amortization of acquired intangible assets (762) (435) 74.9
table: Acquisition-related charges (282) (15) NM
table: Operating (non-GAAP) selling, general and administrative expense $19,560 $18,915 3.4%
question: Analyse this data from a financial earnings document. What is the increase / (decrease) in the Stock-based compensation from 2018 to 2019?