-35.13% is the change from 649 to 421
Calculation steps:
[( 421 - 649 ) ÷ 649] x 100 = -35.13%
Formula
Percentage change = [(421 - 649) / 649] x 100
Subtract the new number by the original number
421 - 649 = -228
-228 ÷ 649 = -0.35130970724191063
-0.35130970724191063 x 100 = -35.13%