-17.05% is the change from 997 to 827
Calculation steps:
[( 827 - 997 ) ÷ 997] x 100 = -17.05%
Formula
Percentage change = [(827 - 997) / 997] x 100
Subtract the new number by the original number
827 - 997 = -170
-170 ÷ 997 = -0.17051153460381144
-0.17051153460381144 x 100 = -17.05%