221.64% is the change from 171 to 550
Calculation steps:
[( 550 - 171 ) ÷ 171] x 100 = 221.64%
Formula
Percentage change = [(550 - 171) / 171] x 100
Subtract the new number by the original number
550 - 171 = 379
379 ÷ 171 = 2.216374269005848
2.216374269005848 x 100 = 221.64%