33.8% is the change from 645 to 863
Calculation steps:
[( 863 - 645 ) ÷ 645] x 100 = 33.8%
Formula
Percentage change = [(863 - 645) / 645] x 100
Subtract the new number by the original number
863 - 645 = 218
218 ÷ 645 = 0.33798449612403103
0.33798449612403103 x 100 = 33.8%