-13.06% is the change from 620 to 539
Calculation steps:
[( 539 - 620 ) ÷ 620] x 100 = -13.06%
Formula
Percentage change = [(539 - 620) / 620] x 100
Subtract the new number by the original number
539 - 620 = -81
-81 ÷ 620 = -0.13064516129032258
-0.13064516129032258 x 100 = -13.06%