-19.76% is the change from 997 to 800
Calculation steps:
[( 800 - 997 ) ÷ 997] x 100 = -19.76%
Formula
Percentage change = [(800 - 997) / 997] x 100
Subtract the new number by the original number
800 - 997 = -197
-197 ÷ 997 = -0.19759277833500502
-0.19759277833500502 x 100 = -19.76%