-77.74% is the change from 939 to 209
Calculation steps:
[( 209 - 939 ) ÷ 939] x 100 = -77.74%
Formula
Percentage change = [(209 - 939) / 939] x 100
Subtract the new number by the original number
209 - 939 = -730
-730 ÷ 939 = -0.777422790202343
-0.777422790202343 x 100 = -77.74%