340.91% is the change from 220 to 970
Calculation steps:
[( 970 - 220 ) ÷ 220] x 100 = 340.91%
Formula
Percentage change = [(970 - 220) / 220] x 100
Subtract the new number by the original number
970 - 220 = 750
750 ÷ 220 = 3.409090909090909
3.409090909090909 x 100 = 340.91%