-97.75% is the change from 799 to 18
Calculation steps:
[( 18 - 799 ) ÷ 799] x 100 = -97.75%
Formula
Percentage change = [(18 - 799) / 799] x 100
Subtract the new number by the original number
18 - 799 = -781
-781 ÷ 799 = -0.9774718397997497
-0.9774718397997497 x 100 = -97.75%