83.57% is the change from 213 to 391
Calculation steps:
[( 391 - 213 ) ÷ 213] x 100 = 83.57%
Formula
Percentage change = [(391 - 213) / 213] x 100
Subtract the new number by the original number
391 - 213 = 178
178 ÷ 213 = 0.8356807511737089
0.8356807511737089 x 100 = 83.57%