-50.78% is the change from 258 to 127
Calculation steps:
[( 127 - 258 ) ÷ 258] x 100 = -50.78%
Formula
Percentage change = [(127 - 258) / 258] x 100
Subtract the new number by the original number
127 - 258 = -131
-131 ÷ 258 = -0.5077519379844961
-0.5077519379844961 x 100 = -50.78%