907.07% is the change from 99 to 997
Calculation steps:
[( 997 - 99 ) ÷ 99] x 100 = 907.07%
Formula
Percentage change = [(997 - 99) / 99] x 100
Subtract the new number by the original number
997 - 99 = 898
898 ÷ 99 = 9.070707070707071
9.070707070707071 x 100 = 907.07%