-21.84% is the change from 664 to 519
Calculation steps:
[( 519 - 664 ) ÷ 664] x 100 = -21.84%
Formula
Percentage change = [(519 - 664) / 664] x 100
Subtract the new number by the original number
519 - 664 = -145
-145 ÷ 664 = -0.2183734939759036
-0.2183734939759036 x 100 = -21.84%