-32.42% is the change from 623 to 421
Calculation steps:
[( 421 - 623 ) ÷ 623] x 100 = -32.42%
Formula
Percentage change = [(421 - 623) / 623] x 100
Subtract the new number by the original number
421 - 623 = -202
-202 ÷ 623 = -0.32423756019261635
-0.32423756019261635 x 100 = -32.42%