215.09% is the change from 212 to 668
Calculation steps:
[( 668 - 212 ) ÷ 212] x 100 = 215.09%
Formula
Percentage change = [(668 - 212) / 212] x 100
Subtract the new number by the original number
668 - 212 = 456
456 ÷ 212 = 2.150943396226415
2.150943396226415 x 100 = 215.09%