209.09% is the change from 220 to 680
Calculation steps:
[( 680 - 220 ) ÷ 220] x 100 = 209.09%
Formula
Percentage change = [(680 - 220) / 220] x 100
Subtract the new number by the original number
680 - 220 = 460
460 ÷ 220 = 2.090909090909091
2.090909090909091 x 100 = 209.09%