-67.87% is the change from 666 to 214
Calculation steps:
[( 214 - 666 ) ÷ 666] x 100 = -67.87%
Formula
Percentage change = [(214 - 666) / 666] x 100
Subtract the new number by the original number
214 - 666 = -452
-452 ÷ 666 = -0.6786786786786787
-0.6786786786786787 x 100 = -67.87%