-63.59% is the change from 931 to 339
Calculation steps:
[( 339 - 931 ) ÷ 931] x 100 = -63.59%
Formula
Percentage change = [(339 - 931) / 931] x 100
Subtract the new number by the original number
339 - 931 = -592
-592 ÷ 931 = -0.635875402792696
-0.635875402792696 x 100 = -63.59%