-19.41% is the change from 644 to 519
Calculation steps:
[( 519 - 644 ) ÷ 644] x 100 = -19.41%
Formula
Percentage change = [(519 - 644) / 644] x 100
Subtract the new number by the original number
519 - 644 = -125
-125 ÷ 644 = -0.19409937888198758
-0.19409937888198758 x 100 = -19.41%