-68.11% is the change from 668 to 213
Calculation steps:
[( 213 - 668 ) ÷ 668] x 100 = -68.11%
Formula
Percentage change = [(213 - 668) / 668] x 100
Subtract the new number by the original number
213 - 668 = -455
-455 ÷ 668 = -0.6811377245508982
-0.6811377245508982 x 100 = -68.11%