-22.37% is the change from 666 to 517
Calculation steps:
[( 517 - 666 ) ÷ 666] x 100 = -22.37%
Formula
Percentage change = [(517 - 666) / 666] x 100
Subtract the new number by the original number
517 - 666 = -149
-149 ÷ 666 = -0.22372372372372373
-0.22372372372372373 x 100 = -22.37%