-99.77% is the change from 431 to 1
Calculation steps:
[( 1 - 431 ) ÷ 431] x 100 = -99.77%
Formula
Percentage change = [(1 - 431) / 431] x 100
Subtract the new number by the original number
1 - 431 = -430
-430 ÷ 431 = -0.9976798143851509
-0.9976798143851509 x 100 = -99.77%