213.23% is the change from 310 to 971
Calculation steps:
[( 971 - 310 ) ÷ 310] x 100 = 213.23%
Formula
Percentage change = [(971 - 310) / 310] x 100
Subtract the new number by the original number
971 - 310 = 661
661 ÷ 310 = 2.132258064516129
2.132258064516129 x 100 = 213.23%