-17.34% is the change from 623 to 515
Calculation steps:
[( 515 - 623 ) ÷ 623] x 100 = -17.34%
Formula
Percentage change = [(515 - 623) / 623] x 100
Subtract the new number by the original number
515 - 623 = -108
-108 ÷ 623 = -0.17335473515248795
-0.17335473515248795 x 100 = -17.34%