-54.73% is the change from 930 to 421
Calculation steps:
[( 421 - 930 ) ÷ 930] x 100 = -54.73%
Formula
Percentage change = [(421 - 930) / 930] x 100
Subtract the new number by the original number
421 - 930 = -509
-509 ÷ 930 = -0.5473118279569893
-0.5473118279569893 x 100 = -54.73%