221.05% is the change from 171 to 549
Calculation steps:
[( 549 - 171 ) ÷ 171] x 100 = 221.05%
Formula
Percentage change = [(549 - 171) / 171] x 100
Subtract the new number by the original number
549 - 171 = 378
378 ÷ 171 = 2.210526315789474
2.210526315789474 x 100 = 221.05%