291.23% is the change from 171 to 669
Calculation steps:
[( 669 - 171 ) ÷ 171] x 100 = 291.23%
Formula
Percentage change = [(669 - 171) / 171] x 100
Subtract the new number by the original number
669 - 171 = 498
498 ÷ 171 = 2.912280701754386
2.912280701754386 x 100 = 291.23%