pre_text: leveraged performance units during the year ended may 31 , 2015 , certain executives were granted performance units that we refer to as 201cleveraged performance units , 201d or 201clpus . 201d lpus contain a market condition based on our relative stock price growth over a three-year performance period . the lpus contain a minimum threshold performance which , if not met , would result in no payout . the lpus also contain a maximum award opportunity set as a fixed dollar and fixed number of shares . after the three-year performance period , which concluded in october 2017 , one-third of the earned units converted to unrestricted common stock . the remaining two-thirds converted to restricted stock that will vest in equal installments on each of the first two anniversaries of the conversion date . we recognize share-based compensation expense based on the grant date fair value of the lpus , as determined by use of a monte carlo model , on a straight-line basis over the requisite service period for each separately vesting portion of the lpu award . the following table summarizes the changes in unvested restricted stock and performance awards for the year ended december 31 , 2017 , the 2016 fiscal transition period and for the years ended may 31 , 2016 and 2015 : shares weighted-average grant-date fair value ( in thousands ) .
post_text: the total fair value of restricted stock and performance awards vested was $ 33.7 million for the year ended december 31 , 2017 , $ 20.0 million for the 2016 fiscal transition period and $ 17.4 million and $ 15.0 million , respectively , for the years ended may 31 , 2016 and 2015 . for restricted stock and performance awards , we recognized compensation expense of $ 35.2 million for the year ended december 31 , 2017 , $ 17.2 million for the 2016 fiscal transition period and $ 28.8 million and $ 19.8 million , respectively , for the years ended may 31 , 2016 and 2015 . as of december 31 , 2017 , there was $ 46.1 million of unrecognized compensation expense related to unvested restricted stock and performance awards that we expect to recognize over a weighted-average period of 1.8 years . our restricted stock and performance award plans provide for accelerated vesting under certain conditions . stock options stock options are granted with an exercise price equal to 100% ( 100 % ) of fair market value of our common stock on the date of grant and have a term of ten years . stock options granted before the year ended may 31 , 2015 vest in equal installments on each of the first four anniversaries of the grant date . stock options granted during the year ended may 31 , 2015 and thereafter vest in equal installments on each of the first three anniversaries of the grant date . our stock option plans provide for accelerated vesting under certain conditions . global payments inc . | 2017 form 10-k annual report 2013 91 .
table: Shares (in thousands) Weighted-AverageGrant-DateFair Value
table: Unvested at May 31, 2014 1,754 $22.72
table: Granted 954 36.21
table: Vested (648) 23.17
table: Forfeited (212) 27.03
table: Unvested at May 31, 2015 1,848 28.97
table: Granted 461 57.04
table: Vested (633) 27.55
table: Forfeited (70) 34.69
table: Unvested at May 31, 2016 1,606 37.25
table: Granted 348 74.26
table: Vested (639) 31.38
table: Forfeited (52) 45.27
table: Unvested at December 31, 2016 1,263 49.55
table: Granted 899 79.79
table: Vested (858) 39.26
table: Forfeited (78) 59.56
table: Unvested at December 31, 2017 1,226 $78.29
question: Analyse this data from a financial earnings document. what was the percentage chaning in the total fair value of restricted stock and performance awards vested from 2016 to 2017?