-17.27% is the change from 799 to 661
Calculation steps:
[( 661 - 799 ) ÷ 799] x 100 = -17.27%
Formula
Percentage change = [(661 - 799) / 799] x 100
Subtract the new number by the original number
661 - 799 = -138
-138 ÷ 799 = -0.17271589486858574
-0.17271589486858574 x 100 = -17.27%