210.51% is the change from 257 to 798
Calculation steps:
[( 798 - 257 ) ÷ 257] x 100 = 210.51%
Formula
Percentage change = [(798 - 257) / 257] x 100
Subtract the new number by the original number
798 - 257 = 541
541 ÷ 257 = 2.105058365758755
2.105058365758755 x 100 = 210.51%