-17.34% is the change from 986 to 815
Calculation steps:
[( 815 - 986 ) ÷ 986] x 100 = -17.34%
Formula
Percentage change = [(815 - 986) / 986] x 100
Subtract the new number by the original number
815 - 986 = -171
-171 ÷ 986 = -0.17342799188640973
-0.17342799188640973 x 100 = -17.34%