309.7% is the change from 237 to 971
Calculation steps:
[( 971 - 237 ) ÷ 237] x 100 = 309.7%
Formula
Percentage change = [(971 - 237) / 237] x 100
Subtract the new number by the original number
971 - 237 = 734
734 ÷ 237 = 3.0970464135021096
3.0970464135021096 x 100 = 309.7%