114.01% is the change from 257 to 550
Calculation steps:
[( 550 - 257 ) ÷ 257] x 100 = 114.01%
Formula
Percentage change = [(550 - 257) / 257] x 100
Subtract the new number by the original number
550 - 257 = 293
293 ÷ 257 = 1.140077821011673
1.140077821011673 x 100 = 114.01%