256.73% is the change from 171 to 610
Calculation steps:
[( 610 - 171 ) ÷ 171] x 100 = 256.73%
Formula
Percentage change = [(610 - 171) / 171] x 100
Subtract the new number by the original number
610 - 171 = 439
439 ÷ 171 = 2.5672514619883042
2.5672514619883042 x 100 = 256.73%