2115.38% is the change from 39 to 864
Calculation steps:
[( 864 - 39 ) ÷ 39] x 100 = 2115.38%
Formula
Percentage change = [(864 - 39) / 39] x 100
Subtract the new number by the original number
864 - 39 = 825
825 ÷ 39 = 21.153846153846153
21.153846153846153 x 100 = 2115.38%