100% is the change from 127 to 254
Calculation steps:
[( 254 - 127 ) ÷ 127] x 100 = 100%
Formula
Percentage change = [(254 - 127) / 127] x 100
Subtract the new number by the original number
254 - 127 = 127
127 ÷ 127 = 1
1 x 100 = 100%
Example