-3.91% is the change from 639 to 614
Calculation steps:
[( 614 - 639 ) ÷ 639] x 100 = -3.91%
Formula
Percentage change = [(614 - 639) / 639] x 100
Subtract the new number by the original number
614 - 639 = -25
-25 ÷ 639 = -0.03912363067292645
-0.03912363067292645 x 100 = -3.91%