-31.36% is the change from 641 to 440
Calculation steps:
[( 440 - 641 ) ÷ 641] x 100 = -31.36%
Formula
Percentage change = [(440 - 641) / 641] x 100
Subtract the new number by the original number
440 - 641 = -201
-201 ÷ 641 = -0.31357254290171604
-0.31357254290171604 x 100 = -31.36%