99600% is the change from 1 to 997
Calculation steps:
[( 997 - 1 ) ÷ 1] x 100 = 99600%
Formula
Percentage change = [(997 - 1) / 1] x 100
Subtract the new number by the original number
997 - 1 = 996
996 ÷ 1 = 996
996 x 100 = 99600%
Example