81.02% is the change from 216 to 391
Calculation steps:
[( 391 - 216 ) ÷ 216] x 100 = 81.02%
Formula
Percentage change = [(391 - 216) / 216] x 100
Subtract the new number by the original number
391 - 216 = 175
175 ÷ 216 = 0.8101851851851852
0.8101851851851852 x 100 = 81.02%