-14.64% is the change from 997 to 851
Calculation steps:
[( 851 - 997 ) ÷ 997] x 100 = -14.64%
Formula
Percentage change = [(851 - 997) / 997] x 100
Subtract the new number by the original number
851 - 997 = -146
-146 ÷ 997 = -0.1464393179538616
-0.1464393179538616 x 100 = -14.64%