165.29% is the change from 121 to 321
Calculation steps:
[( 321 - 121 ) ÷ 121] x 100 = 165.29%
Formula
Percentage change = [(321 - 121) / 121] x 100
Subtract the new number by the original number
321 - 121 = 200
200 ÷ 121 = 1.6528925619834711
1.6528925619834711 x 100 = 165.29%