-33.12% is the change from 939 to 628
Calculation steps:
[( 628 - 939 ) ÷ 939] x 100 = -33.12%
Formula
Percentage change = [(628 - 939) / 939] x 100
Subtract the new number by the original number
628 - 939 = -311
-311 ÷ 939 = -0.33120340788072417
-0.33120340788072417 x 100 = -33.12%