-34.05% is the change from 649 to 428
Calculation steps:
[( 428 - 649 ) ÷ 649] x 100 = -34.05%
Formula
Percentage change = [(428 - 649) / 649] x 100
Subtract the new number by the original number
428 - 649 = -221
-221 ÷ 649 = -0.3405238828967643
-0.3405238828967643 x 100 = -34.05%