-20.32% is the change from 620 to 494
Calculation steps:
[( 494 - 620 ) ÷ 620] x 100 = -20.32%
Formula
Percentage change = [(494 - 620) / 620] x 100
Subtract the new number by the original number
494 - 620 = -126
-126 ÷ 620 = -0.2032258064516129
-0.2032258064516129 x 100 = -20.32%