9.39% is the change from 213 to 233
Calculation steps:
[( 233 - 213 ) ÷ 213] x 100 = 9.39%
Formula
Percentage change = [(233 - 213) / 213] x 100
Subtract the new number by the original number
233 - 213 = 20
20 ÷ 213 = 0.09389671361502347
0.09389671361502347 x 100 = 9.39%