-23.62% is the change from 817 to 624
Calculation steps:
[( 624 - 817 ) ÷ 817] x 100 = -23.62%
Formula
Percentage change = [(624 - 817) / 817] x 100
Subtract the new number by the original number
624 - 817 = -193
-193 ÷ 817 = -0.23623011015911874
-0.23623011015911874 x 100 = -23.62%