-20.07% is the change from 837 to 669
Calculation steps:
[( 669 - 837 ) ÷ 837] x 100 = -20.07%
Formula
Percentage change = [(669 - 837) / 837] x 100
Subtract the new number by the original number
669 - 837 = -168
-168 ÷ 837 = -0.2007168458781362
-0.2007168458781362 x 100 = -20.07%