Table:
|  | Number of Shares | Average Price (a) | Average Life (years) (b) | Aggregate Intrinsic Value |
| --- | --- | --- | --- | --- |
| Outstanding at March 31, 2018 | 1,894 | $12.90 | - | - |
| Options granted | - | - | - | - |
| Options exercised | (326) | 13.11 | - | $1,944 |
| Options cancelled/forfeited | (122) | 13.22 | - | 295 |
| Outstanding at March 31, 2019 | 1,446 | $12.82 | 3.29 | $6,528 |
| Exercisable at March 31, 2019 | 1,347 | $12.70 | 3.08 | $6,253 |
Paragraphs:
Activity under our stock option plans is summarized as follows:
(a) Weighted-average exercise price
(b) Weighted-average contractual life remaining
The total aggregate intrinsic value of options exercised is $2,149, $1,724, and $1,944 for fiscal years ended March 31, 2017, 2018, and 2019, respectively.
Question:
What is the percentage change in the average price between March 31, 2018 and 2019?
Answer: (12.70 - 12.90)/12.90  = -1.55