210.7% is the change from 215 to 668
Calculation steps:
[( 668 - 215 ) ÷ 215] x 100 = 210.7%
Formula
Percentage change = [(668 - 215) / 215] x 100
Subtract the new number by the original number
668 - 215 = 453
453 ÷ 215 = 2.1069767441860465
2.1069767441860465 x 100 = 210.7%