-87.5% is the change from 792 to 99
Calculation steps:
[( 99 - 792 ) ÷ 792] x 100 = -87.5%
Formula
Percentage change = [(99 - 792) / 792] x 100
Subtract the new number by the original number
99 - 792 = -693
-693 ÷ 792 = -0.875
-0.875 x 100 = -87.5%
Example