124.51% is the change from 257 to 577
Calculation steps:
[( 577 - 257 ) ÷ 257] x 100 = 124.51%
Formula
Percentage change = [(577 - 257) / 257] x 100
Subtract the new number by the original number
577 - 257 = 320
320 ÷ 257 = 1.245136186770428
1.245136186770428 x 100 = 124.51%