-4.99% is the change from 641 to 609
Calculation steps:
[( 609 - 641 ) ÷ 641] x 100 = -4.99%
Formula
Percentage change = [(609 - 641) / 641] x 100
Subtract the new number by the original number
609 - 641 = -32
-32 ÷ 641 = -0.0499219968798752
-0.0499219968798752 x 100 = -4.99%