217.68% is the change from 164 to 521
Calculation steps:
[( 521 - 164 ) ÷ 164] x 100 = 217.68%
Formula
Percentage change = [(521 - 164) / 164] x 100
Subtract the new number by the original number
521 - 164 = 357
357 ÷ 164 = 2.176829268292683
2.176829268292683 x 100 = 217.68%