275.44% is the change from 171 to 642
Calculation steps:
[( 642 - 171 ) ÷ 171] x 100 = 275.44%
Formula
Percentage change = [(642 - 171) / 171] x 100
Subtract the new number by the original number
642 - 171 = 471
471 ÷ 171 = 2.754385964912281
2.754385964912281 x 100 = 275.44%