-4.2% is the change from 977 to 936
Calculation steps:
[( 936 - 977 ) ÷ 977] x 100 = -4.2%
Formula
Percentage change = [(936 - 977) / 977] x 100
Subtract the new number by the original number
936 - 977 = -41
-41 ÷ 977 = -0.04196519959058342
-0.04196519959058342 x 100 = -4.2%