-93% is the change from 100 to 7
Calculation steps:
[( 7 - 100 ) ÷ 100] x 100 = -93%
Formula
Percentage change = [(7 - 100) / 100] x 100
Subtract the new number by the original number
7 - 100 = -93
-93 ÷ 100 = -0.93
-0.93 x 100 = -93%
Example