-30.4% is the change from 977 to 680
Calculation steps:
[( 680 - 977 ) ÷ 977] x 100 = -30.4%
Formula
Percentage change = [(680 - 977) / 977] x 100
Subtract the new number by the original number
680 - 977 = -297
-297 ÷ 977 = -0.3039918116683726
-0.3039918116683726 x 100 = -30.4%