-13.23% is the change from 620 to 538
Calculation steps:
[( 538 - 620 ) ÷ 620] x 100 = -13.23%
Formula
Percentage change = [(538 - 620) / 620] x 100
Subtract the new number by the original number
538 - 620 = -82
-82 ÷ 620 = -0.13225806451612904
-0.13225806451612904 x 100 = -13.23%