218.18% is the change from 66 to 210
Calculation steps:
[( 210 - 66 ) ÷ 66] x 100 = 218.18%
Formula
Percentage change = [(210 - 66) / 66] x 100
Subtract the new number by the original number
210 - 66 = 144
144 ÷ 66 = 2.1818181818181817
2.1818181818181817 x 100 = 218.18%