-40.15% is the change from 817 to 489
Calculation steps:
[( 489 - 817 ) ÷ 817] x 100 = -40.15%
Formula
Percentage change = [(489 - 817) / 817] x 100
Subtract the new number by the original number
489 - 817 = -328
-328 ÷ 817 = -0.401468788249694
-0.401468788249694 x 100 = -40.15%