-16.45% is the change from 620 to 518
Calculation steps:
[( 518 - 620 ) ÷ 620] x 100 = -16.45%
Formula
Percentage change = [(518 - 620) / 620] x 100
Subtract the new number by the original number
518 - 620 = -102
-102 ÷ 620 = -0.16451612903225807
-0.16451612903225807 x 100 = -16.45%