261.5% is the change from 213 to 770
Calculation steps:
[( 770 - 213 ) ÷ 213] x 100 = 261.5%
Formula
Percentage change = [(770 - 213) / 213] x 100
Subtract the new number by the original number
770 - 213 = 557
557 ÷ 213 = 2.615023474178404
2.615023474178404 x 100 = 261.5%