-19.59% is the change from 638 to 513
Calculation steps:
[( 513 - 638 ) ÷ 638] x 100 = -19.59%
Formula
Percentage change = [(513 - 638) / 638] x 100
Subtract the new number by the original number
513 - 638 = -125
-125 ÷ 638 = -0.19592476489028213
-0.19592476489028213 x 100 = -19.59%