-98.12% is the change from 799 to 15
Calculation steps:
[( 15 - 799 ) ÷ 799] x 100 = -98.12%
Formula
Percentage change = [(15 - 799) / 799] x 100
Subtract the new number by the original number
15 - 799 = -784
-784 ÷ 799 = -0.981226533166458
-0.981226533166458 x 100 = -98.12%