-15.14% is the change from 799 to 678
Calculation steps:
[( 678 - 799 ) ÷ 799] x 100 = -15.14%
Formula
Percentage change = [(678 - 799) / 799] x 100
Subtract the new number by the original number
678 - 799 = -121
-121 ÷ 799 = -0.15143929912390489
-0.15143929912390489 x 100 = -15.14%