-99.6% is the change from 248 to 1
Calculation steps:
[( 1 - 248 ) ÷ 248] x 100 = -99.6%
Formula
Percentage change = [(1 - 248) / 248] x 100
Subtract the new number by the original number
1 - 248 = -247
-247 ÷ 248 = -0.9959677419354839
-0.9959677419354839 x 100 = -99.6%