215.06% is the change from 166 to 523
Calculation steps:
[( 523 - 166 ) ÷ 166] x 100 = 215.06%
Formula
Percentage change = [(523 - 166) / 166] x 100
Subtract the new number by the original number
523 - 166 = 357
357 ÷ 166 = 2.1506024096385543
2.1506024096385543 x 100 = 215.06%