-2.19% is the change from 639 to 625
Calculation steps:
[( 625 - 639 ) ÷ 639] x 100 = -2.19%
Formula
Percentage change = [(625 - 639) / 639] x 100
Subtract the new number by the original number
625 - 639 = -14
-14 ÷ 639 = -0.02190923317683881
-0.02190923317683881 x 100 = -2.19%