900% is the change from 1 to 10
Calculation steps:
[( 10 - 1 ) ÷ 1] x 100 = 900%
Formula
Percentage change = [(10 - 1) / 1] x 100
Subtract the new number by the original number
10 - 1 = 9
9 ÷ 1 = 9
9 x 100 = 900%
Example