91.91% is the change from 346 to 664
Calculation steps:
[( 664 - 346 ) ÷ 346] x 100 = 91.91%
Formula
Percentage change = [(664 - 346) / 346] x 100
Subtract the new number by the original number
664 - 346 = 318
318 ÷ 346 = 0.9190751445086706
0.9190751445086706 x 100 = 91.91%