-99.89% is the change from 915 to 1
Calculation steps:
[( 1 - 915 ) ÷ 915] x 100 = -99.89%
Formula
Percentage change = [(1 - 915) / 915] x 100
Subtract the new number by the original number
1 - 915 = -914
-914 ÷ 915 = -0.9989071038251366
-0.9989071038251366 x 100 = -99.89%