-16.28% is the change from 639 to 535
Calculation steps:
[( 535 - 639 ) ÷ 639] x 100 = -16.28%
Formula
Percentage change = [(535 - 639) / 639] x 100
Subtract the new number by the original number
535 - 639 = -104
-104 ÷ 639 = -0.162754303599374
-0.162754303599374 x 100 = -16.28%