-34.9% is the change from 957 to 623
Calculation steps:
[( 623 - 957 ) ÷ 957] x 100 = -34.9%
Formula
Percentage change = [(623 - 957) / 957] x 100
Subtract the new number by the original number
623 - 957 = -334
-334 ÷ 957 = -0.3490073145245559
-0.3490073145245559 x 100 = -34.9%