171.61% is the change from 155 to 421
Calculation steps:
[( 421 - 155 ) ÷ 155] x 100 = 171.61%
Formula
Percentage change = [(421 - 155) / 155] x 100
Subtract the new number by the original number
421 - 155 = 266
266 ÷ 155 = 1.7161290322580645
1.7161290322580645 x 100 = 171.61%