-19.12% is the change from 638 to 516
Calculation steps:
[( 516 - 638 ) ÷ 638] x 100 = -19.12%
Formula
Percentage change = [(516 - 638) / 638] x 100
Subtract the new number by the original number
516 - 638 = -122
-122 ÷ 638 = -0.19122257053291536
-0.19122257053291536 x 100 = -19.12%