-16.8% is the change from 619 to 515
Calculation steps:
[( 515 - 619 ) ÷ 619] x 100 = -16.8%
Formula
Percentage change = [(515 - 619) / 619] x 100
Subtract the new number by the original number
515 - 619 = -104
-104 ÷ 619 = -0.1680129240710824
-0.1680129240710824 x 100 = -16.8%