344.09% is the change from 220 to 977
Calculation steps:
[( 977 - 220 ) ÷ 220] x 100 = 344.09%
Formula
Percentage change = [(977 - 220) / 220] x 100
Subtract the new number by the original number
977 - 220 = 757
757 ÷ 220 = 3.440909090909091
3.440909090909091 x 100 = 344.09%