american tower corporation and subsidiaries notes to consolidated financial statements assessments in each of the tax jurisdictions resulting from these examinations .
the company believes that adequate provisions have been made for income taxes for all periods through december 31 , 2010 .
12 .
stock-based compensation the company recognized stock-based compensation of $ 52.6 million , $ 60.7 million and $ 54.8 million for the years ended december 31 , 2010 , 2009 and 2008 , respectively .
stock-based compensation for the year ended december 31 , 2009 included $ 6.9 million related to the modification of the vesting and exercise terms for certain employee 2019s equity awards .
the company did not capitalize any stock-based compensation during the years ended december 31 , 2010 and 2009 .
summary of stock-based compensation plans 2014the company maintains equity incentive plans that provide for the grant of stock-based awards to its directors , officers and employees .
under the 2007 equity incentive plan ( 201c2007 plan 201d ) , which provides for the grant of non-qualified and incentive stock options , as well as restricted stock units , restricted stock and other stock-based awards , exercise prices in the case of non-qualified and incentive stock options are not less than the fair market value of the underlying common stock on the date of grant .
equity awards typically vest ratably over various periods , generally four years , and generally expire ten years from the date of grant .
stock options 2014as of december 31 , 2010 , the company had the ability to grant stock-based awards with respect to an aggregate of 22.0 million shares of common stock under the 2007 plan .
the fair value of each option grant is estimated on the date of grant using the black-scholes option pricing model based on the assumptions noted in the table below .
the risk-free treasury rate is based on the u.s .
treasury yield in effect at the accounting measurement date .
the expected life ( estimated period of time outstanding ) was estimated using the vesting term and historical exercise behavior of company employees .
the expected volatility was based on historical volatility for a period equal to the expected life of the stock options .
key assumptions used to apply this pricing model are as follows: .

2010
2009
2008
range of risk-free interest rate
1.41% ( 1.41 % ) 2013 2.39% ( 2.39 % )
1.41% ( 1.41 % ) 2013 2.04% ( 2.04 % )
1.44% ( 1.44 % ) 2013 3.05% ( 3.05 % )
weighted average risk-free interest rate
2.35% ( 2.35 % )
1.71% ( 1.71 % )
1.89% ( 1.89 % )
expected life of option grants
4.60 years
4.00 years
4.00 years
range of expected volatility of underlying stock price
37.11% ( 37.11 % ) 2013 37.48% ( 37.48 % )
36.00% ( 36.00 % ) 2013 36.63% ( 36.63 % )
28.51% ( 28.51 % ) 2013 35.30% ( 35.30 % )
weighted average expected volatility of underlying stock price
37.14% ( 37.14 % )
36.23% ( 36.23 % )
29.10% ( 29.10 % )
expected annual dividends
n/a
n/a
n/a

the weighted average grant date fair value per share during the years ended december 31 , 2010 , 2009 and 2008 was $ 15.03 , $ 8.90 and $ 9.55 , respectively .
the intrinsic value of stock options exercised during the years ended december 31 , 2010 , 2009 and 2008 was $ 62.7 million , $ 40.1 million and $ 99.1 million , respectively .
as of december 31 , 2010 , total unrecognized compensation expense related to unvested stock options was approximately $ 27.7 million and is expected to be recognized over a weighted average period of approximately two years .
the amount of cash received from the exercise of stock options was approximately $ 129.1 million during the year ended december 31 , 2010 .
during the year ended december 31 , 2010 , the company realized approximately $ 0.3 million of state tax benefits from the exercise of stock options. .

Question: what was the percent of the change in the weighted average risk-free interest rate
Answer: 37.4%

Question: what is the percentage change in the intrinsic value of stock options from 2007 to 2008?
Answer: -59.5%

Question: what was the percent of the change in the intrinsic value of stock options from 2009 to 2010
Answer: 56.4%\\n