101.56% is the change from 257 to 518
Calculation steps:
[( 518 - 257 ) ÷ 257] x 100 = 101.56%
Formula
Percentage change = [(518 - 257) / 257] x 100
Subtract the new number by the original number
518 - 257 = 261
261 ÷ 257 = 1.0155642023346303
1.0155642023346303 x 100 = 101.56%