-45.1% is the change from 623 to 342
Calculation steps:
[( 342 - 623 ) ÷ 623] x 100 = -45.1%
Formula
Percentage change = [(342 - 623) / 623] x 100
Subtract the new number by the original number
342 - 623 = -281
-281 ÷ 623 = -0.4510433386837881
-0.4510433386837881 x 100 = -45.1%