1550% is the change from 6 to 99
Calculation steps:
[( 99 - 6 ) ÷ 6] x 100 = 1550%
Formula
Percentage change = [(99 - 6) / 6] x 100
Subtract the new number by the original number
99 - 6 = 93
93 ÷ 6 = 15.5
15.5 x 100 = 1550%
Example