-14.87% is the change from 639 to 544
Calculation steps:
[( 544 - 639 ) ÷ 639] x 100 = -14.87%
Formula
Percentage change = [(544 - 639) / 639] x 100
Subtract the new number by the original number
544 - 639 = -95
-95 ÷ 639 = -0.1486697965571205
-0.1486697965571205 x 100 = -14.87%