212.9% is the change from 31 to 97
Calculation steps:
[( 97 - 31 ) ÷ 31] x 100 = 212.9%
Formula
Percentage change = [(97 - 31) / 31] x 100
Subtract the new number by the original number
97 - 31 = 66
66 ÷ 31 = 2.129032258064516
2.129032258064516 x 100 = 212.9%