-22.07% is the change from 666 to 519
Calculation steps:
[( 519 - 666 ) ÷ 666] x 100 = -22.07%
Formula
Percentage change = [(519 - 666) / 666] x 100
Subtract the new number by the original number
519 - 666 = -147
-147 ÷ 666 = -0.22072072072072071
-0.22072072072072071 x 100 = -22.07%