Restricted Stock Units
At September 2019, the Compensation Committee of the Board of Directors had authorized and approved the following restricted stock unit awards to members of the Company’s management team pursuant to the provisions of the Company’s Omnibus Plans: At September 2019, the Compensation Committee of the Board of Directors had authorized and approved the following restricted stock unit awards to members of the Company’s management team pursuant to the provisions of the Company’s Omnibus Plans:
(1) 13,150 of the restricted stock units were vested as of September 2019. The remaining 100 restricted stock units
will vest in equal amounts in October 2019 and October 2020.
(2) 8,666 of the restricted stock units were vested as of September 2019. The remaining 4,334 restricted stock units
will vest in October 2019.
(3) 4,333 of the restricted stock units were vested as of September 2019. 4,333 restricted stock units will vest in
October 2019 and 4,334 will vest in October 2020.
(4) The 15,050 restricted stock units will vest in equal amounts in October 2019, October 2020, and October 2021.
There is no direct cost to the recipients of the restricted stock units, except for any applicable taxes. The recipients of the restricted stock units are entitled to the customary adjustments in the event of stock splits, stock dividends, and certain other distributions on the Company’s common stock. All cash dividends and/or distributions payable to restricted stock recipients will be held in escrow until all the conditions of vesting have been met.
The restricted stock units provide that the recipients can elect, at their option, to receive either common stock in the
Company, or a cash settlement based upon the closing price of the Company’s shares, at the time of vesting. Based on
these award provisions, the compensation expense recorded in the Company’s Statement of Operations reflects the
straight-line amortized fair value based on the liability method under “ASC 718 – Compensation – Stock Compensation”.
Net income before income taxes included compensation expense related to the amortization of the Company’s restricted stock unit awards of approximately $1.2 million during both fiscal 2019 and fiscal 2018. These amounts were recorded as accrued expenses in the Company’s Consolidated Balance Sheet at both September 2019 and September 2018. The tax benefit related to this compensation expense was approximately $0.3 million in both fiscal 2019 and fiscal 2018. The total intrinsic value of restricted stock units vested during fiscal 2019 and fiscal 2018 was approximately $1.1 million and $1.2 million, respectively.
Table:
 | Restricted Stock Units(1) | Restricted Stock Units(2) | Restricted Stock Units(3) | Restricted Stock Units(4)
Date of award: | October 2015 | October 2016 | October 2017 | October 2018
Original number of awards issued: | 13,250 | 13,000 | 13,000 | 15,050
Service period: | 36 - 60 months | 36 months | 36 months | 36 months
Estimated fair value of award at grant date: | $1,112,000 | $1,191,000 | $1,177,000 | $ 1,264,000
Non-vested awards outstanding at |  |  |  | 
September 30, 2019: | 100 | 4,334 | 8,667 | 15,050
Fair value of non-vested awards at |  |  |  | 
September 30, 2019 of approximately: | $8,000 | $330,000 | $661,000 | $ 1,148,000


Question: What is the percentage change in the number of restricted stock units originally issued in October 2015 and 2016?
Answer: -1.89
Calculation: (13,000 -13,250)/13,250