-87.11% is the change from 768 to 99
Calculation steps:
[( 99 - 768 ) ÷ 768] x 100 = -87.11%
Formula
Percentage change = [(99 - 768) / 768] x 100
Subtract the new number by the original number
99 - 768 = -669
-669 ÷ 768 = -0.87109375
-0.87109375 x 100 = -87.11%