-2.05% is the change from 977 to 957
Calculation steps:
[( 957 - 977 ) ÷ 977] x 100 = -2.05%
Formula
Percentage change = [(957 - 977) / 977] x 100
Subtract the new number by the original number
957 - 977 = -20
-20 ÷ 977 = -0.02047082906857728
-0.02047082906857728 x 100 = -2.05%