-6.08% is the change from 641 to 602
Calculation steps:
[( 602 - 641 ) ÷ 641] x 100 = -6.08%
Formula
Percentage change = [(602 - 641) / 641] x 100
Subtract the new number by the original number
602 - 641 = -39
-39 ÷ 641 = -0.060842433697347896
-0.060842433697347896 x 100 = -6.08%