33.95% is the change from 645 to 864
Calculation steps:
[( 864 - 645 ) ÷ 645] x 100 = 33.95%
Formula
Percentage change = [(864 - 645) / 645] x 100
Subtract the new number by the original number
864 - 645 = 219
219 ÷ 645 = 0.3395348837209302
0.3395348837209302 x 100 = 33.95%