900% is the change from 27 to 270
Calculation steps:
[( 270 - 27 ) ÷ 27] x 100 = 900%
Formula
Percentage change = [(270 - 27) / 27] x 100
Subtract the new number by the original number
270 - 27 = 243
243 ÷ 27 = 9
9 x 100 = 900%
Example