-80.54% is the change from 817 to 159
Calculation steps:
[( 159 - 817 ) ÷ 817] x 100 = -80.54%
Formula
Percentage change = [(159 - 817) / 817] x 100
Subtract the new number by the original number
159 - 817 = -658
-658 ÷ 817 = -0.8053855569155447
-0.8053855569155447 x 100 = -80.54%