-30.34% is the change from 623 to 434
Calculation steps:
[( 434 - 623 ) ÷ 623] x 100 = -30.34%
Formula
Percentage change = [(434 - 623) / 623] x 100
Subtract the new number by the original number
434 - 623 = -189
-189 ÷ 623 = -0.30337078651685395
-0.30337078651685395 x 100 = -30.34%