254.84% is the change from 217 to 770
Calculation steps:
[( 770 - 217 ) ÷ 217] x 100 = 254.84%
Formula
Percentage change = [(770 - 217) / 217] x 100
Subtract the new number by the original number
770 - 217 = 553
553 ÷ 217 = 2.5483870967741935
2.5483870967741935 x 100 = 254.84%