Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.

Text: the following table provides the weighted average assumptions used in the black-scholes option-pricing model for grants and the resulting weighted average grant date fair value per share of stock options granted for the years ended december 31: . <table class='wikitable'><tr><td>1</td><td>-</td><td>2018</td><td>2017</td><td>2016</td></tr><tr><td>2</td><td>intrinsic value</td><td>$ 9</td><td>$ 10</td><td>$ 18</td></tr><tr><td>3</td><td>exercise proceeds</td><td>7</td><td>11</td><td>15</td></tr><tr><td>4</td><td>income tax benefit realized</td><td>2</td><td>3</td><td>6</td></tr></table> stock units during 2018 , 2017 and 2016 , the company granted rsus to certain employees under the 2007 plan and 2017 omnibus plan , as applicable . rsus generally vest based on continued employment with the company over periods ranging from one to three years. .
Question: what is the intrinsic value in 2018?
Answer: 9.0
Question: what about in 2016?
Answer: 18.0
Question: what is the net change?

user
-9.0
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