256.14% is the change from 171 to 609
Calculation steps:
[( 609 - 171 ) ÷ 171] x 100 = 256.14%
Formula
Percentage change = [(609 - 171) / 171] x 100
Subtract the new number by the original number
609 - 171 = 438
438 ÷ 171 = 2.56140350877193
2.56140350877193 x 100 = 256.14%