221.61% is the change from 310 to 997
Calculation steps:
[( 997 - 310 ) ÷ 310] x 100 = 221.61%
Formula
Percentage change = [(997 - 310) / 310] x 100
Subtract the new number by the original number
997 - 310 = 687
687 ÷ 310 = 2.2161290322580647
2.2161290322580647 x 100 = 221.61%