216.29% is the change from 307 to 971
Calculation steps:
[( 971 - 307 ) ÷ 307] x 100 = 216.29%
Formula
Percentage change = [(971 - 307) / 307] x 100
Subtract the new number by the original number
971 - 307 = 664
664 ÷ 307 = 2.1628664495114007
2.1628664495114007 x 100 = 216.29%