-83.21% is the change from 977 to 164
Calculation steps:
[( 164 - 977 ) ÷ 977] x 100 = -83.21%
Formula
Percentage change = [(164 - 977) / 977] x 100
Subtract the new number by the original number
164 - 977 = -813
-813 ÷ 977 = -0.8321392016376663
-0.8321392016376663 x 100 = -83.21%