996.7% is the change from 91 to 998
Calculation steps:
[( 998 - 91 ) ÷ 91] x 100 = 996.7%
Formula
Percentage change = [(998 - 91) / 91] x 100
Subtract the new number by the original number
998 - 91 = 907
907 ÷ 91 = 9.967032967032967
9.967032967032967 x 100 = 996.7%