31.16% is the change from 645 to 846
Calculation steps:
[( 846 - 645 ) ÷ 645] x 100 = 31.16%
Formula
Percentage change = [(846 - 645) / 645] x 100
Subtract the new number by the original number
846 - 645 = 201
201 ÷ 645 = 0.3116279069767442
0.3116279069767442 x 100 = 31.16%