212.9% is the change from 310 to 970
Calculation steps:
[( 970 - 310 ) ÷ 310] x 100 = 212.9%
Formula
Percentage change = [(970 - 310) / 310] x 100
Subtract the new number by the original number
970 - 310 = 660
660 ÷ 310 = 2.129032258064516
2.129032258064516 x 100 = 212.9%