2830% is the change from 30 to 879
Calculation steps:
[( 879 - 30 ) ÷ 30] x 100 = 2830%
Formula
Percentage change = [(879 - 30) / 30] x 100
Subtract the new number by the original number
879 - 30 = 849
849 ÷ 30 = 28.3
28.3 x 100 = 2830%
Example