-68.61% is the change from 669 to 210
Calculation steps:
[( 210 - 669 ) ÷ 669] x 100 = -68.61%
Formula
Percentage change = [(210 - 669) / 669] x 100
Subtract the new number by the original number
210 - 669 = -459
-459 ÷ 669 = -0.6860986547085202
-0.6860986547085202 x 100 = -68.61%