-25.81% is the change from 837 to 621
Calculation steps:
[( 621 - 837 ) ÷ 837] x 100 = -25.81%
Formula
Percentage change = [(621 - 837) / 837] x 100
Subtract the new number by the original number
621 - 837 = -216
-216 ÷ 837 = -0.25806451612903225
-0.25806451612903225 x 100 = -25.81%