242.41% is the change from 257 to 880
Calculation steps:
[( 880 - 257 ) ÷ 257] x 100 = 242.41%
Formula
Percentage change = [(880 - 257) / 257] x 100
Subtract the new number by the original number
880 - 257 = 623
623 ÷ 257 = 2.424124513618677
2.424124513618677 x 100 = 242.41%