91.34% is the change from 231 to 442
Calculation steps:
[( 442 - 231 ) ÷ 231] x 100 = 91.34%
Formula
Percentage change = [(442 - 231) / 231] x 100
Subtract the new number by the original number
442 - 231 = 211
211 ÷ 231 = 0.9134199134199135
0.9134199134199135 x 100 = 91.34%