-44.62% is the change from 623 to 345
Calculation steps:
[( 345 - 623 ) ÷ 623] x 100 = -44.62%
Formula
Percentage change = [(345 - 623) / 623] x 100
Subtract the new number by the original number
345 - 623 = -278
-278 ÷ 623 = -0.4462279293739968
-0.4462279293739968 x 100 = -44.62%