-86.78% is the change from 749 to 99
Calculation steps:
[( 99 - 749 ) ÷ 749] x 100 = -86.78%
Formula
Percentage change = [(99 - 749) / 749] x 100
Subtract the new number by the original number
99 - 749 = -650
-650 ÷ 749 = -0.8678237650200267
-0.8678237650200267 x 100 = -86.78%