-30.6% is the change from 977 to 678
Calculation steps:
[( 678 - 977 ) ÷ 977] x 100 = -30.6%
Formula
Percentage change = [(678 - 977) / 977] x 100
Subtract the new number by the original number
678 - 977 = -299
-299 ÷ 977 = -0.3060388945752303
-0.3060388945752303 x 100 = -30.6%