-20.55% is the change from 837 to 665
Calculation steps:
[( 665 - 837 ) ÷ 837] x 100 = -20.55%
Formula
Percentage change = [(665 - 837) / 837] x 100
Subtract the new number by the original number
665 - 837 = -172
-172 ÷ 837 = -0.2054958183990442
-0.2054958183990442 x 100 = -20.55%