-23.13% is the change from 817 to 628
Calculation steps:
[( 628 - 817 ) ÷ 817] x 100 = -23.13%
Formula
Percentage change = [(628 - 817) / 817] x 100
Subtract the new number by the original number
628 - 817 = -189
-189 ÷ 817 = -0.23133414932680538
-0.23133414932680538 x 100 = -23.13%