-33.65% is the change from 939 to 623
Calculation steps:
[( 623 - 939 ) ÷ 939] x 100 = -33.65%
Formula
Percentage change = [(623 - 939) / 939] x 100
Subtract the new number by the original number
623 - 939 = -316
-316 ÷ 939 = -0.3365282215122471
-0.3365282215122471 x 100 = -33.65%