-25.93% is the change from 837 to 620
Calculation steps:
[( 620 - 837 ) ÷ 837] x 100 = -25.93%
Formula
Percentage change = [(620 - 837) / 837] x 100
Subtract the new number by the original number
620 - 837 = -217
-217 ÷ 837 = -0.25925925925925924
-0.25925925925925924 x 100 = -25.93%