-19.16% is the change from 642 to 519
Calculation steps:
[( 519 - 642 ) ÷ 642] x 100 = -19.16%
Formula
Percentage change = [(519 - 642) / 642] x 100
Subtract the new number by the original number
519 - 642 = -123
-123 ÷ 642 = -0.19158878504672897
-0.19158878504672897 x 100 = -19.16%