292.4% is the change from 171 to 671
Calculation steps:
[( 671 - 171 ) ÷ 171] x 100 = 292.4%
Formula
Percentage change = [(671 - 171) / 171] x 100
Subtract the new number by the original number
671 - 171 = 500
500 ÷ 171 = 2.9239766081871346
2.9239766081871346 x 100 = 292.4%