-91.04% is the change from 915 to 82
Calculation steps:
[( 82 - 915 ) ÷ 915] x 100 = -91.04%
Formula
Percentage change = [(82 - 915) / 915] x 100
Subtract the new number by the original number
82 - 915 = -833
-833 ÷ 915 = -0.9103825136612022
-0.9103825136612022 x 100 = -91.04%