-29.35% is the change from 620 to 438
Calculation steps:
[( 438 - 620 ) ÷ 620] x 100 = -29.35%
Formula
Percentage change = [(438 - 620) / 620] x 100
Subtract the new number by the original number
438 - 620 = -182
-182 ÷ 620 = -0.29354838709677417
-0.29354838709677417 x 100 = -29.35%