218.66% is the change from 209 to 666
Calculation steps:
[( 666 - 209 ) ÷ 209] x 100 = 218.66%
Formula
Percentage change = [(666 - 209) / 209] x 100
Subtract the new number by the original number
666 - 209 = 457
457 ÷ 209 = 2.186602870813397
2.186602870813397 x 100 = 218.66%