-16.53% is the change from 623 to 520
Calculation steps:
[( 520 - 623 ) ÷ 623] x 100 = -16.53%
Formula
Percentage change = [(520 - 623) / 623] x 100
Subtract the new number by the original number
520 - 623 = -103
-103 ÷ 623 = -0.1653290529695024
-0.1653290529695024 x 100 = -16.53%