257.89% is the change from 171 to 612
Calculation steps:
[( 612 - 171 ) ÷ 171] x 100 = 257.89%
Formula
Percentage change = [(612 - 171) / 171] x 100
Subtract the new number by the original number
612 - 171 = 441
441 ÷ 171 = 2.5789473684210527
2.5789473684210527 x 100 = 257.89%