-66.03% is the change from 939 to 319
Calculation steps:
[( 319 - 939 ) ÷ 939] x 100 = -66.03%
Formula
Percentage change = [(319 - 939) / 939] x 100
Subtract the new number by the original number
319 - 939 = -620
-620 ÷ 939 = -0.6602768903088392
-0.6602768903088392 x 100 = -66.03%