-15.66% is the change from 977 to 824
Calculation steps:
[( 824 - 977 ) ÷ 977] x 100 = -15.66%
Formula
Percentage change = [(824 - 977) / 977] x 100
Subtract the new number by the original number
824 - 977 = -153
-153 ÷ 977 = -0.15660184237461616
-0.15660184237461616 x 100 = -15.66%