-56.99% is the change from 930 to 400
Calculation steps:
[( 400 - 930 ) ÷ 930] x 100 = -56.99%
Formula
Percentage change = [(400 - 930) / 930] x 100
Subtract the new number by the original number
400 - 930 = -530
-530 ÷ 930 = -0.5698924731182796
-0.5698924731182796 x 100 = -56.99%