-17.98% is the change from 623 to 511
Calculation steps:
[( 511 - 623 ) ÷ 623] x 100 = -17.98%
Formula
Percentage change = [(511 - 623) / 623] x 100
Subtract the new number by the original number
511 - 623 = -112
-112 ÷ 623 = -0.1797752808988764
-0.1797752808988764 x 100 = -17.98%