-57.96% is the change from 930 to 391
Calculation steps:
[( 391 - 930 ) ÷ 930] x 100 = -57.96%
Formula
Percentage change = [(391 - 930) / 930] x 100
Subtract the new number by the original number
391 - 930 = -539
-539 ÷ 930 = -0.5795698924731183
-0.5795698924731183 x 100 = -57.96%