2803.33% is the change from 30 to 871
Calculation steps:
[( 871 - 30 ) ÷ 30] x 100 = 2803.33%
Formula
Percentage change = [(871 - 30) / 30] x 100
Subtract the new number by the original number
871 - 30 = 841
841 ÷ 30 = 28.033333333333335
28.033333333333335 x 100 = 2803.33%