2700% is the change from 10 to 280
Calculation steps:
[( 280 - 10 ) ÷ 10] x 100 = 2700%
Formula
Percentage change = [(280 - 10) / 10] x 100
Subtract the new number by the original number
280 - 10 = 270
270 ÷ 10 = 27
27 x 100 = 2700%
Example