-57.28% is the change from 934 to 399
Calculation steps:
[( 399 - 934 ) ÷ 934] x 100 = -57.28%
Formula
Percentage change = [(399 - 934) / 934] x 100
Subtract the new number by the original number
399 - 934 = -535
-535 ÷ 934 = -0.5728051391862955
-0.5728051391862955 x 100 = -57.28%