-15.86% is the change from 977 to 822
Calculation steps:
[( 822 - 977 ) ÷ 977] x 100 = -15.86%
Formula
Percentage change = [(822 - 977) / 977] x 100
Subtract the new number by the original number
822 - 977 = -155
-155 ÷ 977 = -0.1586489252814739
-0.1586489252814739 x 100 = -15.86%