-17.3% is the change from 977 to 808
Calculation steps:
[( 808 - 977 ) ÷ 977] x 100 = -17.3%
Formula
Percentage change = [(808 - 977) / 977] x 100
Subtract the new number by the original number
808 - 977 = -169
-169 ÷ 977 = -0.172978505629478
-0.172978505629478 x 100 = -17.3%