-14.55% is the change from 639 to 546
Calculation steps:
[( 546 - 639 ) ÷ 639] x 100 = -14.55%
Formula
Percentage change = [(546 - 639) / 639] x 100
Subtract the new number by the original number
546 - 639 = -93
-93 ÷ 639 = -0.14553990610328638
-0.14553990610328638 x 100 = -14.55%