-17.2% is the change from 994 to 823
Calculation steps:
[( 823 - 994 ) ÷ 994] x 100 = -17.2%
Formula
Percentage change = [(823 - 994) / 994] x 100
Subtract the new number by the original number
823 - 994 = -171
-171 ÷ 994 = -0.1720321931589537
-0.1720321931589537 x 100 = -17.2%