215.38% is the change from 260 to 820
Calculation steps:
[( 820 - 260 ) ÷ 260] x 100 = 215.38%
Formula
Percentage change = [(820 - 260) / 260] x 100
Subtract the new number by the original number
820 - 260 = 560
560 ÷ 260 = 2.1538461538461537
2.1538461538461537 x 100 = 215.38%