101.21% is the change from 331 to 666
Calculation steps:
[( 666 - 331 ) ÷ 331] x 100 = 101.21%
Formula
Percentage change = [(666 - 331) / 331] x 100
Subtract the new number by the original number
666 - 331 = 335
335 ÷ 331 = 1.012084592145015
1.012084592145015 x 100 = 101.21%