86.42% is the change from 346 to 645
Calculation steps:
[( 645 - 346 ) ÷ 346] x 100 = 86.42%
Formula
Percentage change = [(645 - 346) / 346] x 100
Subtract the new number by the original number
645 - 346 = 299
299 ÷ 346 = 0.8641618497109826
0.8641618497109826 x 100 = 86.42%