206.61% is the change from 257 to 788
Calculation steps:
[( 788 - 257 ) ÷ 257] x 100 = 206.61%
Formula
Percentage change = [(788 - 257) / 257] x 100
Subtract the new number by the original number
788 - 257 = 531
531 ÷ 257 = 2.066147859922179
2.066147859922179 x 100 = 206.61%