-22.94% is the change from 837 to 645
Calculation steps:
[( 645 - 837 ) ÷ 837] x 100 = -22.94%
Formula
Percentage change = [(645 - 837) / 837] x 100
Subtract the new number by the original number
645 - 837 = -192
-192 ÷ 837 = -0.22939068100358423
-0.22939068100358423 x 100 = -22.94%