-6.89% is the change from 639 to 595
Calculation steps:
[( 595 - 639 ) ÷ 639] x 100 = -6.89%
Formula
Percentage change = [(595 - 639) / 639] x 100
Subtract the new number by the original number
595 - 639 = -44
-44 ÷ 639 = -0.06885758998435054
-0.06885758998435054 x 100 = -6.89%