339.37% is the change from 221 to 971
Calculation steps:
[( 971 - 221 ) ÷ 221] x 100 = 339.37%
Formula
Percentage change = [(971 - 221) / 221] x 100
Subtract the new number by the original number
971 - 221 = 750
750 ÷ 221 = 3.3936651583710407
3.3936651583710407 x 100 = 339.37%