-21.83% is the change from 623 to 487
Calculation steps:
[( 487 - 623 ) ÷ 623] x 100 = -21.83%
Formula
Percentage change = [(487 - 623) / 623] x 100
Subtract the new number by the original number
487 - 623 = -136
-136 ÷ 623 = -0.21829855537720708
-0.21829855537720708 x 100 = -21.83%