-82.4% is the change from 977 to 172
Calculation steps:
[( 172 - 977 ) ÷ 977] x 100 = -82.4%
Formula
Percentage change = [(172 - 977) / 977] x 100
Subtract the new number by the original number
172 - 977 = -805
-805 ÷ 977 = -0.8239508700102354
-0.8239508700102354 x 100 = -82.4%