85.8% is the change from 345 to 641
Calculation steps:
[( 641 - 345 ) ÷ 345] x 100 = 85.8%
Formula
Percentage change = [(641 - 345) / 345] x 100
Subtract the new number by the original number
641 - 345 = 296
296 ÷ 345 = 0.8579710144927536
0.8579710144927536 x 100 = 85.8%