-16.61% is the change from 620 to 517
Calculation steps:
[( 517 - 620 ) ÷ 620] x 100 = -16.61%
Formula
Percentage change = [(517 - 620) / 620] x 100
Subtract the new number by the original number
517 - 620 = -103
-103 ÷ 620 = -0.16612903225806452
-0.16612903225806452 x 100 = -16.61%