-77.42% is the change from 939 to 212
Calculation steps:
[( 212 - 939 ) ÷ 939] x 100 = -77.42%
Formula
Percentage change = [(212 - 939) / 939] x 100
Subtract the new number by the original number
212 - 939 = -727
-727 ÷ 939 = -0.7742279020234292
-0.7742279020234292 x 100 = -77.42%