2790% is the change from 30 to 867
Calculation steps:
[( 867 - 30 ) ÷ 30] x 100 = 2790%
Formula
Percentage change = [(867 - 30) / 30] x 100
Subtract the new number by the original number
867 - 30 = 837
837 ÷ 30 = 27.9
27.9 x 100 = 2790%
Example