83.1% is the change from 213 to 390
Calculation steps:
[( 390 - 213 ) ÷ 213] x 100 = 83.1%
Formula
Percentage change = [(390 - 213) / 213] x 100
Subtract the new number by the original number
390 - 213 = 177
177 ÷ 213 = 0.8309859154929577
0.8309859154929577 x 100 = 83.1%