29900% is the change from 3 to 900
Calculation steps:
[( 900 - 3 ) ÷ 3] x 100 = 29900%
Formula
Percentage change = [(900 - 3) / 3] x 100
Subtract the new number by the original number
900 - 3 = 897
897 ÷ 3 = 299
299 x 100 = 29900%
Example