53.59% is the change from 209 to 321
Calculation steps:
[( 321 - 209 ) ÷ 209] x 100 = 53.59%
Formula
Percentage change = [(321 - 209) / 209] x 100
Subtract the new number by the original number
321 - 209 = 112
112 ÷ 209 = 0.5358851674641149
0.5358851674641149 x 100 = 53.59%