-98.14% is the change from 807 to 15
Calculation steps:
[( 15 - 807 ) ÷ 807] x 100 = -98.14%
Formula
Percentage change = [(15 - 807) / 807] x 100
Subtract the new number by the original number
15 - 807 = -792
-792 ÷ 807 = -0.9814126394052045
-0.9814126394052045 x 100 = -98.14%