-67.25% is the change from 977 to 320
Calculation steps:
[( 320 - 977 ) ÷ 977] x 100 = -67.25%
Formula
Percentage change = [(320 - 977) / 977] x 100
Subtract the new number by the original number
320 - 977 = -657
-657 ÷ 977 = -0.6724667349027635
-0.6724667349027635 x 100 = -67.25%