-99.77% is the change from 428 to 1
Calculation steps:
[( 1 - 428 ) ÷ 428] x 100 = -99.77%
Formula
Percentage change = [(1 - 428) / 428] x 100
Subtract the new number by the original number
1 - 428 = -427
-427 ÷ 428 = -0.9976635514018691
-0.9976635514018691 x 100 = -99.77%