257.94% is the change from 214 to 766
Calculation steps:
[( 766 - 214 ) ÷ 214] x 100 = 257.94%
Formula
Percentage change = [(766 - 214) / 214] x 100
Subtract the new number by the original number
766 - 214 = 552
552 ÷ 214 = 2.5794392523364484
2.5794392523364484 x 100 = 257.94%