146.2% is the change from 171 to 421
Calculation steps:
[( 421 - 171 ) ÷ 171] x 100 = 146.2%
Formula
Percentage change = [(421 - 171) / 171] x 100
Subtract the new number by the original number
421 - 171 = 250
250 ÷ 171 = 1.4619883040935673
1.4619883040935673 x 100 = 146.2%