3000% is the change from 9 to 279
Calculation steps:
[( 279 - 9 ) ÷ 9] x 100 = 3000%
Formula
Percentage change = [(279 - 9) / 9] x 100
Subtract the new number by the original number
279 - 9 = 270
270 ÷ 9 = 30
30 x 100 = 3000%
Example