-24.02% is the change from 641 to 487
Calculation steps:
[( 487 - 641 ) ÷ 641] x 100 = -24.02%
Formula
Percentage change = [(487 - 641) / 641] x 100
Subtract the new number by the original number
487 - 641 = -154
-154 ÷ 641 = -0.24024960998439937
-0.24024960998439937 x 100 = -24.02%