32.95% is the change from 258 to 343
Calculation steps:
[( 343 - 258 ) ÷ 258] x 100 = 32.95%
Formula
Percentage change = [(343 - 258) / 258] x 100
Subtract the new number by the original number
343 - 258 = 85
85 ÷ 258 = 0.32945736434108525
0.32945736434108525 x 100 = 32.95%