-37.44% is the change from 641 to 401
Calculation steps:
[( 401 - 641 ) ÷ 641] x 100 = -37.44%
Formula
Percentage change = [(401 - 641) / 641] x 100
Subtract the new number by the original number
401 - 641 = -240
-240 ÷ 641 = -0.374414976599064
-0.374414976599064 x 100 = -37.44%