-92.76% is the change from 428 to 31
Calculation steps:
[( 31 - 428 ) ÷ 428] x 100 = -92.76%
Formula
Percentage change = [(31 - 428) / 428] x 100
Subtract the new number by the original number
31 - 428 = -397
-397 ÷ 428 = -0.927570093457944
-0.927570093457944 x 100 = -92.76%