-87.09% is the change from 767 to 99
Calculation steps:
[( 99 - 767 ) ÷ 767] x 100 = -87.09%
Formula
Percentage change = [(99 - 767) / 767] x 100
Subtract the new number by the original number
99 - 767 = -668
-668 ÷ 767 = -0.8709256844850065
-0.8709256844850065 x 100 = -87.09%