-6.6% is the change from 939 to 877
Calculation steps:
[( 877 - 939 ) ÷ 939] x 100 = -6.6%
Formula
Percentage change = [(877 - 939) / 939] x 100
Subtract the new number by the original number
877 - 939 = -62
-62 ÷ 939 = -0.06602768903088392
-0.06602768903088392 x 100 = -6.6%