-30.78% is the change from 939 to 650
Calculation steps:
[( 650 - 939 ) ÷ 939] x 100 = -30.78%
Formula
Percentage change = [(650 - 939) / 939] x 100
Subtract the new number by the original number
650 - 939 = -289
-289 ÷ 939 = -0.3077742279020234
-0.3077742279020234 x 100 = -30.78%