-67.12% is the change from 666 to 219
Calculation steps:
[( 219 - 666 ) ÷ 666] x 100 = -67.12%
Formula
Percentage change = [(219 - 666) / 666] x 100
Subtract the new number by the original number
219 - 666 = -447
-447 ÷ 666 = -0.6711711711711712
-0.6711711711711712 x 100 = -67.12%