-3.89% is the change from 977 to 939
Calculation steps:
[( 939 - 977 ) ÷ 977] x 100 = -3.89%
Formula
Percentage change = [(939 - 977) / 977] x 100
Subtract the new number by the original number
939 - 977 = -38
-38 ÷ 977 = -0.038894575230296824
-0.038894575230296824 x 100 = -3.89%