261.86% is the change from 215 to 778
Calculation steps:
[( 778 - 215 ) ÷ 215] x 100 = 261.86%
Formula
Percentage change = [(778 - 215) / 215] x 100
Subtract the new number by the original number
778 - 215 = 563
563 ÷ 215 = 2.6186046511627907
2.6186046511627907 x 100 = 261.86%