5700% is the change from 15 to 870
Calculation steps:
[( 870 - 15 ) ÷ 15] x 100 = 5700%
Formula
Percentage change = [(870 - 15) / 15] x 100
Subtract the new number by the original number
870 - 15 = 855
855 ÷ 15 = 57
57 x 100 = 5700%
Example