-4.84% is the change from 641 to 610
Calculation steps:
[( 610 - 641 ) ÷ 641] x 100 = -4.84%
Formula
Percentage change = [(610 - 641) / 641] x 100
Subtract the new number by the original number
610 - 641 = -31
-31 ÷ 641 = -0.0483619344773791
-0.0483619344773791 x 100 = -4.84%